Isobutyric acid (2S,5S,6R,7R,9R,10S,12S)-9,12-dihydroxy-1,5,9-trimethyl-4,13-dioxo-3-oxa-tricyclo[8.2.1.02,6]tridec-7-yl ester 在
sodium tetrahydroborate 作用下,
生成 Isobutyric acid (2S,5S,6R,7R,9R,10R,12S)-9,12,13-trihydroxy-1,5,9-trimethyl-4-oxo-3-oxa-tricyclo[8.2.1.0
2,6]tridec-7-yl ester