semicarbazide of N-(3-formyl-5-methyl-benzoyl)-N-tert-butyl-N'-(2-ethyl-3-methoxy-benzoyl) hydrazide;[[3-[Tert-butyl-[(2-ethyl-3-methoxybenzoyl)amino]carbamoyl]-5-methylphenyl]methylideneamino]urea;[[3-[tert-butyl-[(2-ethyl-3-methoxybenzoyl)amino]carbamoyl]-5-methylphenyl]methylideneamino]urea