Chemical constituents of the stems of Ficus triangularis

Chemical investigation of the stems of Ficus triangularis afforded 3,5,4\u27-trihydroxy-6 ,6 - dimethylpyrano[2 ,3 :7,6]flavanone (1), a mixture of α-amyrin fatty acid ester (2a), β-amyrin fatty acid ester (2b) and lupeol fatty acid ester (2c) in a 2:1:1 ratio, stigmast-4-en-3-one (3), and a mixture of β-sitosterol (4a) and stigmasterol (4b) in a 1:2 ratio. The structure of 1 was elucidated by extensive 1D and 2D NMR spectroscopy, while those of 2a-4 were identified by comparison of their 1H and/or 13C NMR data with those reported in the literature