4H-1-benzopyran-4-one, 6-chloro-5,8-dihydroxy-2-phenyl- 6-chloro-5,8-dihydroxy-2-phenyl-4H-chromen-4-one InChI=1/C15H9ClO4/c16-9-6-11(18)15-13(14(9)19)10(17)7-12(20-15)8-4-2-1-3-5-8/h1-7,18-19