Showing papers by "Angelo C. Pinto published in 1993"
TL;DR: From the MeOH extract of the seeds of Fevillea trilobata (Cucurbitaceae) were isolated fevicordin A glucoside, cayaponoside B, and a new heptanorcucurbitsacin glucosides, which were established as 29-nor-1,2,3,4,5,10-dehydro-25-methoxy-2-O-beta-D-glucop
Abstract: From the MeOH extract of the seeds of Fevillea trilobata (Cucurbitaceae) were isolated fevicordin A glucoside [1], cayaponoside B [2], cayaponoside D [3], a new norcucurbitacin glucoside, and a new heptanorcucurbitacin glucoside. The structure of the new norcucurbitacin glucoside, andirobicin A glucoside, was established as 29-nor-1,2,3,4,5,10-dehydro-25-methoxy-2-O-beta-D-glucopyranosyl- 3,16 alpha,20R,22 xi-tetrahydroxy-11-oxocucurbit-23-ene [4], and that of the novel heptanorcucurbitacin glucoside, andirobicin B glucoside, as 22,23,24,25,26,27,29-heptanor-1,2,3,4,5,10-dehydro-2-O-beta-D-g luc opyranosyl-3,16 alpha-dihydroxycucurbita-11,20-dione [5].
9 citations
7 citations
TL;DR: The 15-oxa-gibberellanes obtained in this article are enantiomeric analogs of the natural Gibberellanins and this represents the first synthesis of this type of compounds.
6 citations
TL;DR: Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2',3':6,7) -6",6"-dim-ethyI- 2H,4H-Pyran (2",3":2,3)xanthone and a new xanthone l,6-dioxioxioxoxy-5methoxy-6,6'dim-ethyl-1.7-(3,3-dimethylprop-2-enyl)
Abstract: Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2',3':6,7) -6",6"-dim-ethyI-2H,4H-pyran(2",3":2,3)xanthone and a new xanthone l,6-dihydroxy-5-methoxy-6',6'-dim-ethyl-2H-pyran(2',3':3,2)-7-(3,3-dimethylprop-2-enyl)xanthone were isolated from the ether extract of the root bark of Rheedia acuminata together with friedelin and friedelanol.
TL;DR: A new bis- nor -diterpene has been isolated from Vellozia variabilis and its structure was determined by spectroscopic methods and X-ray diffraction analysis.