6-(3,4-dihydroxybenzyl)-3-ethyl-1-(2,4,6-trichlorophenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
6-(3,4-dihydroxybenzyl)-3-ethyl-1-(2,4,6-trichlorophenyl)-1,5-dihydro-4h-pyrazolo[3,4-d]pyrimidin-4-one