da Silva, Edna L.Meneses

Hocquemiller, Reynald

Lapr\ue9vote, Olivier

Roblot, Fran\ue7ois

Serani, Laurent

Abstract: Collision-induced dissociation (CID) of lithiated molecules generated by liquid SIMS (LSIMS) from two new natural compounds, annoheptocin A and B, led to their structural elucidation. Mass spectrometry (MS) and tandem mass spectrometry (MS/MS) investigations of their acetonide derivatives displayed obvious differences of reactivity of the lithiated dioxane and dioxolane rings towards CID, The 1,3-dioxane (six-membered) ring could be the target of hydrogen rearrangement processes, leading to the formation of a tetrahydrofuran ring through the loss of a molecule of acetone. (C) 1998 John Wiley & Sons, Ltd

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Structure elucidation of annoheptocins, two new heptahydroxylated C-37 acetogenins by high-energy collision-induced dissociation tandem mass spectrometry

Structure elucidation of annoheptocins, two new heptahydroxylated C-37 acetogenins by high-energy collision-induced dissociation tandem mass spectrometry

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