(4R,5R)-5-Carbomethoxy-4,5-dimethyl-2(E)-ethylidene-5-pentanolide

integerrimine (methylthio)methyl ether

integerrinecic acid dimethyl ester

integerrinecic acid (methylthio)methylether

(3R,4R)-6-Eth-(E)-ylidene-3,4-dimethyl-3-methylsulfanylmethoxy-oxepane-2,7-dione