(3R,3aS,6aR,7aR,11aS,11bR,11cS)-5-Ethoxy-10-methoxy-3,11a,11c-trimethyl-3a,4,5,6a,7,7a,8,11a,11b,11c-decahydro-1H,3H-6-oxa-benzo[de]anthracene-2,11-dione 、
三氟乙酸酐 在
吡啶 作用下,
反应 1.0h,
以88%的产率得到8β-((benzoyloxy)methyl)-1β-methoxy-13-methyl-7α-(trifluoroacetoxy)-19-nor-9β-podocarp-13-en-12-one