Penciclovir Impurity B

Chemical Name: 9-[4-(Acetyloxy)-3-(hydroxymethyl)butyl]-2-amino-1,9-dihydro-6H-purin-6-one ; Mono-O-acetylpenciclovir ; BRL 42222

Synonym: (1R,3S,5R,6R,9R,11R,15S,16R,17R,18S,19E,21E,23E,25E,27E,29E,31E,33R,35S,36R)-33-((4-amino-3,5-dihydroxy-6-(l1-methyl-13C)tetrahydro-2H-2l3,3l3,4l3,5l3,6l3-pyran-2-yl-2,3,4,5,6-13C5)oxy)-1,3,5,6,9,11,17,37-octahydroxy-15,16,18-trimethyl-13-oxo-14,39-dioxabicyclo[33.3.1]nonatriaconta-19,21,23,25,27,29,31-heptaene-36-carboxylic acid