“…of the khatamines as oxalates were performed as reported earlier (5,8). After dissolving the oxalates (700 mg) in CH2C12 and treating with NH3 gas, Ac2G and pyridine were added and the mixture stirred at room temperature for 24 h. The reaction mixture was diluted with CH2C12, poured into ice-saturated aqueous NaHC03, and stirred.…”