SMILES: CC[C@@H]1[C@@H]([C@@H]([C@H](C(=O)[C@@H](C[C@@]([C@@H]([C@H]([C@@H]([C@H](C(=O)O1)C)O[C@H]2C[C@@]([C@H]([C@@H](O2)C)O)(C)O)C)O[C@H]3[C@@H]([C@H](C[C@H](O3)C)[NH+](C)C)O)(C)O)C)C)O)C
Description: The molecule is an erythromycin cation resulting from the protonation of the tertiary amino group of erythromycin D; the major species at pH 7.3. It is a conjugate acid of an erythromycin D.