167542-64-5 3,3-(o-Chlorobenzylidene)-bis-(4-hydroxybergapten) 6,6'-((2-Chlorophenyl)methylene)bis(5-hydroxy-4-methoxy-7H-furo(3,2-g)(1)benzopyran-7-one) 7H-Furo(3,2-g)(1)benzopyran-7-one, 6,6'-((2-chlorophenyl)methylene)bis(5-hydroxy-4-methoxy-