(4R,5R)-4-methyl-5-<(3,5-dinitrobenzoyloxy)methyl>-5-hexanolide

integerrimine (methylthio)methyl ether

(2R,3R)-5-Eth-(E)-ylidene-2,3-dimethyl-2-methylsulfanylmethoxy-hexanedioic acid 1-((7R,7aR)-7-hydroxy-5,6,7,7a-tetrahydro-3H-pyrrolizin-1-ylmethyl) ester

(4R,5R)-5-Carboxy-4,5-dimethyl-5-pentanolide

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