上游原料
(E)-3-(4-hydroxy-3-methoxyphenyl)-2-propenoic acid4-bromobutyl (E)-3-(4-hydroxy-3-methoxyphenyl)-2-propenoate(4R)-4-[(3R,5S,7S,8R,9S,10S,13R,14S,17R)-3,7-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid4-bromobutyl (E)-3-[4-([(4R)-4-[(3R,5S,7S,8R,9S,10S,13R,14S,17R)-3,7-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl]oxy)-3-methoxyphenyl]-2-propenoate
