Micafungin Dessulfonic acid impurity

Chemical Name: Sodium 5-((1S,2S)-2-((2R,6S,9S,11R,12R,14aS,15S,20S,23S,25aS)-20-((R)-3-amino-1-hydroxy-3-oxopropyl)-2,11,12,15-tetrahydroxy-6-((R)-1-hydroxyethyl)-5,8,14,19,22,25-hexaoxo-9-(4-(5-(4-(pentyloxy)phenyl)isoxazol-3-yl)benzamido)tetracosahydro-1H-dipyrrolo[2,1-c:2',1'-l][1,4,7,10,13,16]hexaazacyclohenicosin-23-yl)-1,2-dihydroxyethyl)-2-hydroxyphenyl sulfate

Synonym: Micafungin Impurity B

Smile: OC1=CC=C([C@H](O)[C@@H](O)[C@@H]2NC([C@H]3N(C([C@@]([C@@H](C)O)([H])NC([C@@H](NC(C4=CC=C(C5=NOC(C6=CC=C(OCCCCC)C=C6)=C5)C=C4)=O)C[C@@H](O)[C@@H](O)NC([C@@H]7[C@@H](O)CCN7C([C@@H](NC2=O)[C@H](O)CC(N)=O)=O)=O)=O)=O)C[C@H](O)C3)=O)C=C1OS([O-])(=O)=O.[Na+]