(3Z)-3-[(2E,4E,6E,8E)-1-hydroxy-4-methyldeca-2,4,6,8-tetraen-1-ylidene]pyrrolidine-2,4-dione 2,4-pyrrolidinedione, 3-[(2E,4E,6E,8E)-1-hydroxy-4-methyl-2,4,6,8-decatetraenylidene]-, (3Z)- 3-(1-Hydroxy-4-methyl-deca-2,4,6,8-tetraenylidene)-pyrrolidine-2,4-dione InChI=1/C15H17NO3/c1-3-4-5-6-7-11(2)8-9-12(17)14-13(18)10-16-15(14)19/h3-9,17H,10H2,1-2H3,(H,16,19)/b4-3+,6-5+,9-8+,11-7+,14-12 Ravenic acid