130518-26-2 Caribbazoin B Ethyl 2-(1-(1,3-dihydro-1,3-dioxo-2H-inden-2-ylidene)methyl)-1-methylhydrazine Hydrazinecarboxylic acid, 2-((1,3-dihydro-1,3-dioxo-2H-inden-2-ylidene)methyl)-1-methyl-, ethyl ester