GuanylmelamineMetformin EP Impurity B Price Not Available 25mg GuanylmelamineMetformin EP Impurity B Supplier Page Catalog Number R032019 Molecular Formula C4H8N8 CAS# 4405-08-7 Purity ≥95% Inchi InChI=1S/C4H8N8/c5-1(6)9-4-11-2(7)10-3(8)12-4/h(H8,5,6,7,8,9,10,11,12) Inchi Key QLVPICNVQBBOQP-UHFFFAOYSA-N SMILES C1(=NC(=NC(=N1)N=C(N)N)N)N Size 25mg Supplier Page https://www.musechem.com/product/R032019.html