(3'S)-1β-Methyl-7α-<(tetrahydropyran-2-yl)oxy>-6β-<3'-<(tetrahydropyran-2-yl)oxy>-trans-1'-octenyl>bicyclo<3.3.0>octan-3-one 、
(4-carboxybutylene)triphenylphosphorane 在
(4-carboxybutylene)triphenylphosphorane 作用下,
以66.7的产率得到(5Z)-5-[(3aR,4R,5R,6aS)-6a-methyl-5-(oxan-2-yloxy)-4-[(E,3S)-3-(oxan-2-yloxy)oct-1-enyl]-1,3,3a,4,5,6-hexahydropentalen-2-ylidene]pentanoic acid