50823-52-4 6-Carbomethoxyamino-2,3-dimethoxy-4-hydroxybenzocycloheptane BRN 2766751 CARBAMIC ACID, (2,3-DIMETHOXY-4-HYDROXY-6,7,8,9-TETRAHYDROBENZOCYCLOHEPTEN-6-YL) Carbamic acid, (2,3-dimethoxy-4-hydroxy-6,7,8,9-tetrahydrobenzocyclohepten-6-yl)-, methyl ester