3-methylcyclohepta[d]imidazol-6-one

3-bromo-2-(2-oxopropyl)-4-phenoxy-2H-furan-5-one

(2,2-dimethyl-1,3-dioxolan-4-yl)methanethiol

(2,2-dimethyl-[1,3]oxathiolan-5-yl)-methanol

2-[5-(hydroxyiminomethyl)furan-2-yl]propan-2-ol