L-Alanine, N -(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 1-[4-C -(difluoromethyl)-β-D-arabinofuranosyl]-2,4(1H,3H )-pyrimidinedione
L-Alanine, N -(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 1-[4-C -(difluoromethyl)-β-D-arabinofuranosyl]-2,4(1H,3H )-pyrimidinedione