Minocycline Impurity 21

Chemical Name: (4S,4aS,12aS)-9-(2-(tert-butylamino)acetamido)-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-N-(hydroxymethyl)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide

Smile: OC1=C(C(NCO)=O)C([C@@]2(O)C(O)=C3C(C4=C(O)C(NC(CNC(C)(C)C)=O)=CC(N(C)C)=C4CC3C[C@@]2([H])[C@@H]1N(C)C)=O)=O