N′-[9-[2-Deoxy-3,5-bis-O-(4-methylphenyl)-α-D-erythro-pentofuranosyl]-9H-purin-6-yl]-N,N-dimethylmethanimidamide

N′-[7-[2-Deoxy-3,5-bis-O-(4-methylphenyl)-α-D-erythro-pentofuranosyl]-7H-purin-6-yl]-N,N-dimethylmethanimidamide

Maytansine, N2′-[4-[(3-carboxypropyl)dithio]-4-methyl-1-oxopentyl]-N2′-deacetyl-, N2′→6′′ amide with guanosine 5′-(trihydrogen diphosphate) P′-(6-amino-6-deoxy-β-L-galactopyranosyl) ester