Labetalol EP Impurity E

Chemical Name: Mixture of 3 stereoisomers of 5,5′-piperazine-2,5-diylbis(2-hydroxybenzamide)

Synonym: (4R,12aS)-N-(2,4-difluorobenzyl)-7-hydroxy-4-(methyl-d3)-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-4,12,12-d3-9-carboxamide

Smile: NC(C1=CC([C@@H]2NC[C@H](C3=CC=C(O)C(C(N)=O)=C3)NC2)=CC=C1O)=O