4-Methyl-7,10-dihydrobenzo[h]coumarin and 4-Methyl-7,8,9,10-tetrahydro-8,9-epoxybenzo[h]coumarin

The coumarin rings in the title molecules, C₁₄H₁₂O₂ and C₁₄H₁₂O₃, are planar. In the epoxide derivative, the tetrahydrobenzene ring adopts a boat conformation and the oxirane plane is nearly perpendicular to the coumarin moiety.

-1