phosphate-buffered saline T=37°C; 24 h; enzymic hydrolysis with rubbit serum; different reaction time; 14C-labelled compounds detected; Product distribution;

Multi-step reaction with 3 steps 1.1: anhydrous iron chloride / acetone / 0.33 h / |Reflux; |Inert atmosphere1.2: 0 °C2.1: toluene-4-sulfonic acid / methanol / 4 h / pH 23.1: pyridine / dichloromethane / 2 h / 0 °C