1-Phenyl-2,3-dimethyl-4-phenyl-glyoxylidenaminopyrazoline-5-one 24428-95-3 4-(Phenylglyoxylidenamino)antipyrine 5-25-14-00098 (Beilstein Handbook Reference) Antipyrine, 4-(phenylglyoxylidenamino)- BRN 0689607