Fig. 9

Molecular structure of proposed diosgenin derived aglycones for m/z 415 Da fragment ion for (A) a closed ring structure with side-chain glycosylation at the C-3 position [28], (B) an open ring structure with side-chain glycosylation at the C-3 and C-26 positions [28], and C protodioscin with the core aglycone ‘disogenin’ highlighted in red