methyl 4-(hydroxymethyl)-4-nitro-5-oxoundecanoate

methyl 5-hydroxy-2-(hydroxymethyl)-2-nitrohexanoate

5-O-ethyl 1-O-methyl 2-(hydroxymethyl)-2-nitropentanedioate

1-(trimethylsilyloxymethyl)pyrrolidine-2,5-dione

1-(4-methylphenyl)-2,5-dihydropyrrole