1H-pyrrolo[2,3-d]pyrimidine-2,4(3H,7H)-dione, 6-(4-hydroxy-3-methoxybenzoyl)-5-(4-hydroxyphenyl)- 6-(4-Hydroxy-3-methoxy-benzoyl)-5-(4-hydroxy-phenyl)-1,7-dihydro-pyrrolo[2,3-d]pyrimidine-2,4-dione 6-(4-hydroxy-3-methoxybenzoyl)-5-(4-hydroxyphenyl)-1H-pyrrolo[2,3-d]pyrimidine-2,4(3H,7H)-dione InChI=1/C20H15N3O6/c1-29-13-8-10(4-7-12(13)25)17(26)16-14(9-2-5-11(24)6-3-9)15-18(21-16)22-20(28)23-19(15)27/h2-8,24-25H,1H3,(H3,21,22,23,27,28 Rigidin B