2 documents found, page 1 of 1
Withanolides from Leaves of Nicandra physalodes
Carrero,Diego A. S.; Batista,Pedro H. J.; Souza,Luciana G. S.; Pinto,Francisco C. L.; Vasconcelos,Mayron A. de; Teixeira,Edson H.; Canuto,Kirley M.Five new withanolides, designated as 15-oxo-nicaphysalin B, 6β,7α-dihydroxynicandrenone 10, 24α,25β-dihydroxy-nicandrenone-2 and a mixture of the epimers 17-(1α/1β-methylpropanone)-nicandrenone, in addition to six known others, were isolated from the leaf acetone extract from Nicandra physalodes. The complete structures of the five new withanolides, particularly their relative stereochemistries, were establishe...
Miscellaneous Diterpenes from the Aerial Parts of Plectranthus ornatus Codd
Ávila,Fábio N.; Pinto,Francisco C. L.; Sousa,Thiciana S.; Torres,Maria Conceição M.; Costa-Lotufo,Leticia V.; Rocha,Danilo D.; Vasconcelos,Mayron A. deFive new diterpenes derivatives named as ornatin A, B, C, D and E, in addition to six known related diterpenes were isolated from the aerial parts of cultivated specimens of Plectranthus ornatus. The structures were elucidated using a combination of 1D/2D nuclear magnetic resonance (NMR) spectroscopy, high-resolution electrospray ionization mass spectrometry (HRESIMS) and comparison with published NMR data of a...