methyl 7-oxohept-5-ynoate

11,15-bis-O-(t-butyldimethylsilyl)-5,6-didehydro-7-hydroxy-PGE2 methyl ester

11,15-bis-O-(t-butyldimethylsilyl)-5,6-didehydro-7-thiobenzoyloxy-PGE2 methyl ester

(S)-(2-hydroxyheptyl)triphenylphosphonium iodide