[(3R,4aR,5S,10S,10aR,10bS)-10-[tert-butyl(dimethyl)silyl]oxy-3-ethenyl-10b-hydroxy-3,4a,7,7,10a-pentamethyl-1-oxo-5,8,9,10-tetrahydro-2H-benzo[f]chromen-5-yl] 2-(2-chloroacetyl)oxyacetate 生成
1α,9α-dihydroxy-8,13-epoxy-7β-morpholinoacetoxyacetoxylabda-5,14-dien-11-one