Solution structure and assignments of the H-1 and C-13 NMR spectra of erythromycin C in organic and aqueous solution

摘要

Erythromycin C (1) has been shown to exist as a 4:5 equilibrium mixture of the 9-ketone and 12,9-hemiacetal ring-chain tautomers in aqueous solution at ambient temperature. [References: 11]