18791-21-4 2-Pyridinecarboxamide, 3-hydroxy-N-(10-hydroxy-5,11-dimethyl-2-(1-methylpropylidene)-3,7,12-trioxo-9-(3-pyridinylmethyl)-1,4-dioxa-8-azacyclododec-6-yl)-, (5R-(2Z,5R*,6S*,9S*,10S*,11R*))- (9CI) Erizomycin NSC 246134 Pyridomycin