4,9-epoxy-6α-isobutyryloxy-14,15α-isopropylidenedioxy-(5β)-cevane-3β,4β,7α,16β,20-pentaol 在
sodium periodate 作用下,
生成 4t,6c,7c-Trihydroxy-1r,7t,10c-trimethyl-4bt,5t-acetonid-3t-isobutyryloxy-1t-(2-formyl-aethyl)-carbonsaeure-(2t)->14at-lacton-1,2c,3t,4c,4ac,4bc,5c,6t,6at,7,7at,8,9,10t,11,13,13ac,13bt,14-nonadecahydrofluoreno<2,1-b>chinolizin