AW Purdie

DD Rowan

GB Russell

HE Connor

JM Waters

RA Pauptit

The structure of l9αH-lupeol
methyl ether isolated from Chionochloa bromoides has been determined by 13C n.m.r.
spectroscopy and X-ray diffraction. Crystals of the triterpene
are monoclinic, space group P21, with a 8.071(1), b
14.5477(6), c 11.6061(4) �, β
104.466(5)�, V 319.6 �3 and Z 2. The structure was solved by direct
methods, and was refined to R 0.054 for 1092 observed reflections. Previous
reports of synthetic and naturally occurring 19αH-lupanes are briefly
discussed, as is the distribution of the chemotaxonomically
discriminating triterpene methyl ethers in Chionochloa.</jats:p

The structure of 19αH-Lupeol methyl ether from Chionochloa bromoides

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