1H-2-benzopyran-1-one, 3-(3,3-dichloro-2-hydroxypropyl)-8-hydroxy-6-methoxy- 3-(3,3-dichloro-2-hydroxypropyl)-8-hydroxy-6-methoxy-1H-isochromen-1-one InChI=1/C13H12Cl2O5/c1-19-7-2-6-3-8(5-10(17)12(14)15)20-13(18)11(6)9(16)4-7/h2-4,10,12,16-17H,5H2,1H