Two Novel Cycloartane-Type Triterpenes from Trichilia casaretti C. DC. (Meliaceae).

Two new triterpenes cycloartane-type, named 24-methylencycloartan-12-oxo-3ß,22α-diol and trichiliol, were isolated from the leaves of Trichilia casaretti C. DC. together with three known triterpenes­24-methylencycloart-3ß,22-diol, 22,25-dihydrocycloart-23(E)-en-3ß-ol, and 22(R)-hydroxycycloart-24-en-3-ol. These compounds were characterized on the basis of their spectral data, mainly 1D (¹H and 13C) and 2D NMR (¹H-¹H-COSY, ¹H-¹H-NOESY, HMQC, HSQC, and HMBC), and mass spectra (EI-MS and HR-ESI-MS), also involving comparison with data from the literature.