4-chloro-2-phenyl-5,7-dihydrothieno<3,4-d>pyrimidine 6,6-dioxide

2-[1-(6,6-dioxo-2-phenyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)-4-piperidyl]acetic acid

2-[4-(6,6-dioxo-2-phenyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)piperazin-1-yl]acetic acid

2-[4-[(6,6-dioxo-2-phenyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)amino]-1-piperidyl]acetic acid

2-[3-[(6,6-dioxo-2-phenyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)amino]phenyl]acetic acid