1 R3Z 1-[(2s)-2,3-dihydro-1,4-benzodioxin-2-ylmethyl]-3-hydroxythieno[3,2-D]pyrimidine-2,4(1h,3h)-dione 1.000 2 XOB 1-[[(3~{R})-2,3-dihydro-1,4-benzodioxin-3-yl]methyl]-3-oxidanyl-thieno[3,2-D]pyrimidine-2,4-dione 1.000