L-Alanine, N -(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 4-amino-1-[4-C -(difluoromethyl)-β-D-arabinofuranosyl]-2(1H )-pyrimidinone
L-Alanine, N -(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 4-amino-1-[4-C -(difluoromethyl)-β-D-arabinofuranosyl]-2(1H )-pyrimidinone