Taraxastane-type triterpenes from the aerial roots of Ficus microcarpa

Seven new taraxastane-type triterpenes-20-taraxastene-3 beta,22 alpha-diol (1), 3 beta-acetoxy-20-taraxasten-22 alpha-ol (2), 3 beta-acetoxy-22 alpha-methoxy-20-taraxastene (3), 3 beta-acetoxy-20 alpha,21 alpha-epoxytaraxastan-22 alpha-ol (4), 3 beta-acetoxy-19 alpha-methoxy-20-taraxastene (5), 3 beta-acetoxy-19 alpha-hydroperoxy-20-taraxastene (6), 3 beta-acetoxy-20 alpha,21 alpha-epoxytaraxastane (7)-were isolated from the aerial roots of Ficus microcarpa, Their structures were elucidated by spectroscopic and chemical methods.