| abstract |
A method for separating a high molecular weight compound containing lactone, which has an alkyl group as a side chain, from a high molecular weight compound containing lactone, which has an alkenyl group as a side chain, the high molecular weight compounds having containing lactone a common basic chemical structure, using a strong cation exchange resin containing sulfonic acid groups pretreated with silver ions, in which the basic chemical structure of high molecular weight compounds containing lactone is 1, 14- dihydroxy-12- [2- (4-hydroxy-3- methoxycyclohexyl) -1-methylvinyl] -23, 25-dimethoxy-13, 19, 21, 27- |