Linagliptin Related Compound B Catalogue No. - VL870015 CAS No. - N/A Molecular Formula - C30H36N8O4 Molecular Weight - 572.66 IUPAC Name - tert-butyl (R)-(1-(7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)piperidin-3-yl)carbamate Synonyms - Linagliptin N-Boc Impurity