重氮甲烷 、
7-[(1R)-3c,5c-dihydroxy-2t-(3-oxo-trans-propenyl)-cyclopent-r-yl]-hept-5c-enoic acid 、 2,4,4,6-tetramethyl-5,6-dihydro-4
H-[1,3]oxazine; lithio derivative 生成
(15Ξ)-9α,11α,15-trihydroxy-16-((Ξ)-4,4,6-trimethyl-5,6-dihydro-4H-[1,3]oxazin-2-yl)-16-apo-prosta-5c,13t-dien-1-oic acid methyl ester