128126-44-3 Antibiotic TAN 1057A Hexanamide, 3-amino-N-(2-((aminocarbonyl)amino)-1,4,5,6-tetrahydro-4-oxa-5-pyrimidinyl)-6-((aminoiminomethyl)amino)-N-methyl-, (S-(R*,R*))- Hexanamide, 3-amino-N-(2-((aminocarbonyl)amino)-1,4,5,6-tetrahydro-4-oxo-5-pyrimidinyl)-6-((aminoiminomethyl)amino)-N-methyl-, (S-(R*,R*))- Tan 1057A