Carla Kauffmann

Steroidal and triterpenoidal glucosides from passiflora alata

Five glycosides were isolated from leaves of P. alata. The structures 1-5 were obtained through extensive spectral analyses as 3-O- β-D-glucopyranosyl-stigmasterol (1), 3-O-β-D-glucopyranosyloleanolic acid (2), 3-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-oleanolic acid (3), 3-Oβ-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-oleanolic acid (4) and 9,19-cyclolanost-24Z-en3β,21,26-trihydroxy-3,26-di-O-gentiobiose (5). Comparison of the TLC profiles of the hydroethanolic extracts from leaves of other Passiflora species found in the south of Brazil (P. actinia, P. caerulea, P. edulis var. flavicarpa, P. elegans, P. foetida, P. misera and P. tenuifila) showed that only P. alata presented saponin accumulation.

Constituents from leaves of Quillaja brasiliensis

A new abietane diterpene, the 19-O-β-d-glucopyranoside of 16-hydroxylambertic acid was isolated from the leaves of Quillaja brasiliensis together with a known prosapogenin (3-O-β-d-glucuronopyranosyl-quillaic acid), quercetin, and rutin. The new compound was identified by chemical and spectroscopic methods.