NC76733
2-Oxa-6,9,12,15-tetraazaheptadecan-17-oic acid, 1-[1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-12-[2-[(methoxyoxoacetyl)amino]ethyl]-7,8,16-trioxo-, methyl ester