Spiro[2H-1-benzopyran-2,4'-[4H]pyran]-4(3H)-one, 2',3',5',6'-tetrahydro-

Spiro[2H-1-benzopyran-2,4'-[4H]pyran]-4(3H)-one, 2',3',5',6'-tetrahydro- · CAS 954422-16-3