(8-Methyl-5,7-dioxo-2,3,5,6,7,8-hexahydrothiazolo(3,2-f)purin-6-yl)acetic acid piperidine 1-((1,4,6,7-Tetrahydro-1-methyl-2,4-dioxothiazolo(2,3-f)purin-3(2H)-yl)acetyl)piperidine 178452-81-8 Piperidine, 1-((1,4,6,7-tetrahydro-1-methyl-2,4-dioxothiazolo(2,3-f)purin-3(2H)-yl)acetyl)-