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

ABSTRACT: Two new triterpenes cycloartane-type, named 24-methylencycloartan-12-oxo-3β,22α-diol and trichiliol, were isolated from the leaves of Trichilia casaretti C. DC. together with three known triterpenes—24-methylencycloart-3β,22-diol, 22,25-dihydrocycloart-23(E)-en-3β-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.

SUBMITTER: Vieira IJC 

PROVIDER: S-EPMC6017113 | biostudies-other | 2018 Apr

REPOSITORIES: biostudies-other

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Two new triterpenes cycloartane-type, named 24-methylencycloartan-12-oxo-3β,22α-diol and trichiliol, were isolated from the leaves of <i>Trichilia casaretti</i> C. DC. together with three known triterpenes—24-methylencycloart-3β,22-diol, 22,25-dihydrocycloart-23(<i>E</i>)-en-3β-ol, and 22(<i>R</i>)-hydroxycycloart-24-en-3-ol. These compounds were characterized on the basis of their spectral data, mainly 1D (¹H and <sup>13</sup>C) and 2D NMR (¹H-¹H-COSY, ¹H-¹H-NOESY, HMQC, HSQC, and HMBC), and ma  ...[more]