label: 1-2-isopropoxy-2-oxidodihydro-4H,6H-spiro(furo(3,2-d)(1,3,2)dioxaphosphinine-7,2'-oxetan)-6-yl)pyrimidine-2,4(1H,3H)-dione
label_lc: 1-2-isopropoxy-2-oxidodihydro-4h,6h-spiro(furo(3,2-d)(1,3,2)dioxaphosphinine-7,2'-oxetan)-6-yl)pyrimidine-2,4(1h,3h)-dione