氨气

6-(2-Deoxy-β-D-ribosyl)tetrazolo<1,5-c>pyrimidine-5(6H)-one

1-(3,5-O-dibenzoyl-2-deoxy-β-D-erythro-pentofuranosyl)-4-methoxy-2-pyrimidone

4-N-picolyl-2'-deoxycytidine

2'-deoxy-3',5'-di-O-acetylcytidine