Prenylated Dihydrostilbenes From Macaranga rubiginosa

Phytochemical isolation of the methanol extract of Macaranga rubiginosa leaves afforded five prenylated dihydrostilbenes. Two of them were known dihydrostilbenes laevifolins A (1) and B (2), while the other three were new compounds, trivially named macarubiginosins A–C (3–5). The structures of the new compounds were elucidated based on their UV, 1D and 2D NMR, and HR-ESI-MS spectral data. Compounds 1–5 were tested for their cytotoxicity against P-388 cells, showing that compound 1 was the most active with IC 50 4.3 µM

Dihydroflavonol and Flavonol Derivatives from Macaranga recurvata

Two new dihydroflavonol derivatives, macarecurvatins A and B, have been isolated from the leaves of Macaranga recurvata (Euphorbiaceaae), along with the known compounds diisoprenylaromadendrin, glyasperin A and broussoflavonol F. The structures of the new compounds were determined on the basis of of 0.83 M. spectroscopic evidence. Upon cytotoxic evaluation against P-388 cells, macarecurvatin B showed strong activity with an IC 5

Macagigantin, a farnesylated flavonol from Macaranga gigantea

A new farnesylated flavonol derivative, macagigantin (1), together with two known flavonoids, glyasperin A (2) and apigenin (3), had been isolated from the acetone extract of the leaves of Macaranga gigantea. The structure of the new compound was elucidated as 6-farnesylkaempferol based on its spectroscopic data, including UV, IR, 1D and 2D NMR, and HR-EI-MS spectra. Compounds 1–3 were evaluated for their cytotoxic properties against P-388 cells, their IC values being 11.3, 6.0, and 5.1 mM, respectively

Senyawa Morusin dari Tumbuhan Murbei Hitam (Morus Nigra)

Tumbuhan murbei hitam merupakan salah satu spesies dari genus Morus. Tumbuhan dari genus ini telah dilaporkan kaya akan senyawa turunan fenol seperti flavonoid, 2-arilbenzofuran dan stilben. Dalam rangka pencarian senyawa turunan fenol dari tumbuhan murbei Indonesia maka telah berhasil diisolasi suatu senyawa flavon terprenilasi yaitu morusin dari ekstrak metanol kayu batang murbei hitam (M. nigra). Struktur senyawa tersebut telah ditetapkan berdasarkan data-data spektroskopi yang meliputi spektrum UV dan IR serta membandingkan KLTnya dengan senyawa morusin standar

Aktivitas Sitotoksik Alkaloid Dari Cryptocarya Archboldiana Allen

Cryptocarya is one of the largest genus of Lauraceae and most of the species grow in the tropical rain forests of Asia-Pacific, include in Indonesian forest. Generally Cryptocarya contains alkaloids, 2-piron, and flavonoids as well as has a variety of biological activities. Three alkaloids have been isolated from Cryptocarya archboldiana; boldine, laurolitsine, and reticuline. The molecular structure of all these compounds have been established by spectroscopic analysis (UV, 1H, and 13C NMR) and comparison with the spectral data of compounds that have been reported. The cytotoxic of laurolitsine showed moderate activity, while boldine and reticuline have weak activity against P388 murine leukemia cells. Key words: C. archboldiana, alkaloid, cytotoxic, aporphine, benzylisoquinoline

N-METIL LAUROTETANIN DAN BOLDIN, DUA SENYAWA TURUNAN ALKALOID APORFIN DARI Cryptocarya tawaensis Merr (Lauraceae)

Cryptocarya  (Lauraceae),  yang  dikenal  dengan  nama  daerah  “medang† merupakan  salah  satu  kelompok tumbuhan  endemik  hutan  tropik  Indonesia.  Kelompok  tumbuhan  ini  secara  fitokimia  merupakan  penghasil metabolit sekunder golongan alkaloid, α-piron, flavonoid dan triterpen. Berkaitan dengan hal tersebut di atas, kajian fitokimia terhadap senyawa alkaloid dari spesies Cryptocarya tawaensis  Merr (Lauraceae) belum pernah dilaporkan  sebelumnya.  Hasil  penelitian  terhadap  spesies  ini  telah  berhasil  diisolasi  dan  diidentifikasi  dua senyawa turunan alkaloid aporfin, yaitu N-metillaurotetanin (1) dan  boldin (2), dimana struktur molekul kedua senyawa  tersebut  ditetapkan    berdasarkan  sifat  fisika,  data  spektroskopi  UV,  IR,  1H-NMR  dan  serta perbandingan dengan data senyawa standar yang telah dilaporkan. Senyawa 1 pernah dilaporkan sebelumnya dari spesies C. longifolia, sementara senyawa 2 baru pertama kali ditemukan dalam tumbuhan Cryptocarya. Berdasarkan penemuan kedua senyawa tersebut, dapat disimpulkan bahwa C. tawaensis dapat dikelompokkan ke dalam tumbuhan Cryptocarya penghasil alkaloid. Kata kunci: Alkaloid, Aporfin, N-metil laurotetanin, boldin, Cryptocarya tawaensis  Merr, Lauracea

Resveratrol Oligomers From Dipterocarpus Hasseltii: Cytotoxic Effect and Chemotaxonomic Significance

Two resveratrol tetramers, (-)-vaticanol B and (-)-hopeaphenol, were isolated from acetoneextract of the tree bark of Dipterocarpus hasseltii (Dipterocarpaceae), together with the knownresveratrol trimer, (-)-α-viniferin. The structures of these compounds were established based onspectroscopic evidence, UV, IR,1H-NMR,13C-NMR and determined by comparison with thestandard compounds. The cytotoxic activities of these compounds were evaluated against murineleukaemia P-388 cells. The IC50 values of all compounds were 42.2, 5.0 and 17.5 μg/ml,respectively. In addition, chemotaxonomic significance relationship between Dipterocarpus, Shoreaand Vatica will also be briefly discussed

LIMA SENYAWA CALKON DARI KULIT BATANG CRYPTOKARYA PHOEBEOPSIS (LAURACEAE) DAN SIFAT SITOTOKSIKNYA TERHADAP SEL P 388, SEL HCT 166 DAN SEL A549

oai:jurnalunj.journal.unj.ac.id:article/5Cryptocarya merupakan salah satu genus besar dari famili tumbuhan Lauraceae dan tumbuh di daerah tropis dan subtropis. Genus ini dikenal sebagai sumber yang kaya akan senyawa flavonoid, alkaloid, piron, dan triterpen. Sebagai bagian dari kajian fitokimia dan evaluasi biologis dari beberapa spesies Cryptocarya yang berasal dari Indonesia, kami meneliti tumbuhan C. phoebeopsis yang berasal dari Sorong, Papua, Indonesia. Hasil kajian fitokimia terhadap spesies ini menghasilkan lima senyawa calkon yaitu infektokaryon (1), kriptokaryon (2), kurzicalkolakton A (3), B (4) dan calkokaryanon C (5). Penentuan struktur senyawa hasil isolasi dilakukan berdasarkan analisis data spektroskopi (UV, IR, NMR, MS). Hasil uji bioaktivitas senyawa hasil isolasi untuk aktivitas sitotoksiknya terhadap sel murine leukemia P388, sel HCT 116 (kanker usus besar) dan sel A549 (adenokarsinoma paru-paru), terlihat bahwa infektokaryon (1) dan kriptokaryon (2) menunjukkan aktivitas sitotoksik yang sangat kuat terhadap sel murine leukemia P388 dan sel HCT 116.   Cryptocarya is one of the large genera of Lauraceae and growing in tropical and subtropical regions. This genus is known to be a rich source of flavonoids, alkaloids, pyrones, and triterpenes. As part of our chemical and biological evaluation of the Cryptocarya spesies growing in Indonesia, we examined C. phoebeopsis collecting from Sorong, Papua, Indonesia. Our investigation of chemical constituents on this species afforded five chalcone compounds namely infectocaryone (1), cryptocaryone (2), kurzichalcolactone A (3), B (4) and chalcocaryanone C (5). The structures of these compounds were elucidated based on spectroscopic analysis (UV, IR, NMR, MS). On biological evaluation of these compounds for their cytotoxic activity against murine leukemia P388 cells, HCT 116 (colon cancer) cell line and A549 (Human lung adenocarcinoma epithelial) cell line. it was found that infectocaryone (1) and cryptocaryone (2) exhibited strong inhibition activities against murine leukemia P388 cells and HCT 116 cell line. KeywordsCalkon, Cryptocarya phoebeopsis, Sel Murine Leukemia P388, Sel HCT 116 dan Sel A54

Ilmu Kimia Tanaman Lauraceae Indonesia: VI. Kriptokaryon dari Cryptocarya Laevigata BL. (Lauraceae)

Ekstraksi kulit akar dan kulit barang tanaman Cryptocarya laevigata Bl. (Lauraceae) dengan n-heksan menghasilkan suatu calkon yang diidentifikasi sebagai kriptokaryon (I). Struktur senyawa ini ditetapkan berdasarkan data spektroskopi dan analisis Kristal sinar-X. Kesimpulan mengenai struktur kriptokaryon (I) mendukung saran peneliti sebelumnya, yang terlah merevisi struktur (II) yang pertama kali disarankan. C. laevigata adalah spesies kedua anggota suku Lauraceae yang telah ditemukan mengandung kriptokaryon (I). Tambahan pula, kriptokaryon (I) adalah senyawa alam kedua dari jenis flavonoid yang mengandung cincin A yang tereduksi sebagian, yang pernah ditemukan. Extraction of the root and the tree barks of Cryptocarya laevigata Bl. (Lauraceae) with n-hexane yielded a chalcone identified as cryptocaryone (I). The structure of this compound had been elucidated based on spectroscopic measurements and X-ray crystal analysis. Conclusions about the structure of cryprocaryone (I) confirm the previous suggestion, which revised the structure (ll) suggested earlier. C. laevigata is the second species of Lauraceae which contains cryptocaryone (I). Furthermore, cryptocaryone (I) is a second naturally occurring flavonoid containing a reduced A ring system which has so far been isolated