des-N-ethyldiacetyl chasmanine 、 alkaline earth salt of/the/ methylsulfuric acid 以
水 、
乙腈 为溶剂,
以80%的产率得到(3S,6S,6aS,8S,9R,10S,11aR,12R,12aR,13R)-6,10,13-trimethoxy-3-(methoxymethyl)-1-methyltetradecahydro-11aH-3,6a,12-(epiethane[1,1,2]triyl)-7,9-methanonaphtho[2,3-b]azocine-8,11a-diyl diacetate