136266-66-5

Benzoic acid,4-[5-[[2-(4-carboxyphenyl)-4-ethyl-3,7-dihydro-6-hydroxy-7-methyl-3-oxo-2H-pyrazolo[3,4-b]pyridin-5-yl]methylene]-4-ethyl-3,5,6,7-tetrahydro-7-methyl-3,6-dioxo-2H-pyrazolo[3,4-b]pyridin-2-yl]-