spiro,cyclohexane,isobenzofuran,benzofuran,furan
Furan
111160-28-21-(5-Chloro-2,5-dideoxy-.beta.-D-erythro-pentofuranosyl)-5-methyl-4-(1,2,4-triazol-1-yl)pyrimidin-2(1H)-one
17187-79-02(3H)-Furanone,4-(1,3-benzodioxol-5-ylmethyl)dihydro-3-[(3,4,5-trimethoxyphenyl)methylene]-,[R-(E)]-