2-(5,7,8,9-Tetrahydro-2,3,4-trimethoxy-6H-benzocyclohepten-6-ylidene)hydrazinecarboxamide 4-08-00-02817 (Beilstein Handbook Reference) 49562-06-3 6-Semicarbazono-2,3,4-trimethoxybenzocycloheptane BRN 3445444 Hydrazinecarboxamide, 2-(5,7,8,9-tetrahydro-2,3,4-trimethoxy-6H-benzocyclohepten-6-ylidene)-