3-(6-((2-Hydroxyethyl)methylamino)pyridazin-3-yl)carbazic acid ethyl ester 5-25-18-00063 (Beilstein Handbook Reference) 54121-07-2 BRN 0892773 CARBAZIC ACID, 3-(6-((2-HYDROXYETHYL)METHYLAMINO)PYRIDAZIN-3-YL)-, ETHYL ESTER