(3,5-Dioxo-4-(3-oxobutyl)-1,2-diphenyl-4-pyrazolidinyl)methyl hexadecanoate 42190-62-5 5-25-03-00283 (Beilstein Handbook Reference) BRN 0735349 Hexadecanoic acid, (3,5-dioxo-4-(3-oxobutyl)-1,2-diphenyl-4-pyrazolidinyl)methyl ester