(4,5,7-Trimethoxy-12,12-dimethyl-15-oxo-6-propan-2-yl-9-tricyclo[9.4.0.03,8]pentadeca-1(11),3(8),4,6-tetraenyl) acetate 以45%的产率得到[(9S,15R)-15-hydroxy-4,5,7-trimethoxy-12,12-dimethyl-6-propan-2-yl-9-tricyclo[9.4.0.03,8]pentadeca-1(11),3(8),4,6-tetraenyl] acetate