(E,E)-6-alpha-Hydroxygermacra-1(10),4,11(13)-trien-12-oic acid gamma-lactone 553-21-9 CCRIS 6754 Costunlide Costunolid Costunolide Costus lactone Cyclodeca(b)furan-2(3H)-one, 3a,4,5,8,9,11a-hexahydro-6,10-dimethyl-3-methylene-, (3aS-(3aR*,6E,10E,11aS*))- (9CI) Germacra-1(10),4,11(13)-trien-12-oic acid, 6-alpha-hydroxy-, gamma-lactone, (E,E)- NSC 106404