2-(2-(carboxymethyl)ethyl)-2-methyl-1,3-dioxolane

3',5'-di-O-levulinyl-2'-O-(2-methoxyethyl)-5-methyluridine

2,2'-dimethyl-3',4'-dihydro-2H,2'H-[2,3']bifuranyl-5,5'-dione

4-(cyclopenta-2,4-dien-1-ylidene)pentanoic acid