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Published on: August 16, 2018
Two new 24-isopropenyl-lanostanoids from Tillandsia brachycaulos
Zulema Cantillo-Ciau1, Gonzalo J Mena-Rejón, Esther Quintero-Mármol
1Laboratorio de Química Orgánica de Investigación, Facultad de Química, Universidad Aut6noma de Yucatán, Calle 41 No. 421, Col. Industrial, C. P. 97150, Mérida, Yucatán, Mexico.
Abstract:
The leaves of Tillandsia brachycaulos afforded two novel tetracyclic triterpenoids identified as (24S)-24-isopropenyl-29-nor-5alpha-lanosta-7-en-3beta-ol (1) and (24S)-24-isopropenyl-29-nor-5alpha-lanosta-7-en-3-one (2), in addition to the known isopimaric acid (3) and chlorogenic acid (4). Their structures were elucidated on the basis of spectral analysis, including homo- and heteronuclear correlation NMR experiments (COSY, ROESY, HMQC and HMBC) and by comparison with data in the literature. The antimicrobial and antifungal activities were studied. The compounds did not show significant activity.
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