12-chloromethylabieta-8,11,13-trien-18-oic acid methyl ester 、
1-(2,4,6-三甲基苯基)-咪唑 以
乙腈 为溶剂,
以73%的产率得到3-[((4bS,8R,8aR)-2-isopropyl-8-(methoxycarbonyl)-4b,8-dimethyl-4b,5,6,7,8,8a,9,10-octahydrophenanthren-3-yl)methyl]-1-mesityl-3H-imidazol-1-ium chloride