oxotetrahydrofuran,pyrimidine,dione,furan,tetrahydrofuran
Furan
126754-19-6(1as,4s,4as,8r,8as)-4-(furan-3-yl)-4a,8-dimethyl-1a,4,5,6,7,8-hexahydrooxireno[2,3-d]isochromen-2-one
127695-05-04,5,6,7-tetrachloro-2',7'-dihydroxy-1',3',6',8'-tetraiodo-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one