The title compound, C(29)H(48)O, is a triterpenoid isolated from Adiantum incisum forssk. In the crystal structure, the asymmetric unit contains two independent mol-ecules which are not significantly different. Each mol-ecule contains four six-membered rings, all adopting chair conformations, and a five-membered ring in an envelope conformation. In the mol-ecular structure, non-classical intra-...

A new lanostan-type triterpenoid with hydroperoxy group, toosendanin A (1), together with two known triterpenoids, meliastatin 3 (2) and ursolic acid (3), were isolated and identified from the stems of Melia toosendan. The structures of these compounds were elucidated by 1Dand 2D-NMR spectra and other spectroscopic studies. These compounds were assayed for the antibacterial activities against s...

against M. phlei and M. 8megmati8, using the medium of Dubos (1947), but the results were unsatisfactory, since the lower dilutions showed a turbidity which was undistinguishable from the growth of the organism. A point of minimum turbidity was noted however in each case, which may give some indication of the limiting dilution. This occurred with the triterpenoid acid at 1: 16,000 and with ungu...

The title compound, C30H48O2, contains a fused four-ring triterpenoid system. In the mol-ecule, the two cyclo-hexane rings adopt a chair conformation and a twist boat conformation, respectively, the central cyclo-hexene ring adopts a half-chair conformation whereas the five membered ring adopts an envelope conformation. In the crystal, O-H⋯O hydrogen bonds between the hy-droxy and carbonyl grou...