1,5,6,7-Tetrahydro-9,10,11-trimethoxybenzo(3,4)cyclohepta(1,2-b)pyran-3(2H)-one 49562-03-0 BRN 1262869 Benzo(3,4)cyclohepta(1,2-b)pyran-3(2H)-one, 1,5,6,7-tetrahydro-9,10,11-trimethoxy- beta-(5-(6-Hydroxy-2,3,4-trimethoxybenzocyclohepten-5-yl))propionic acid delta-lactone