... Planta Med 2005; 71(3): 249-253 DOI: 10.1055/s ... were performed at 30 °C for 2 h. They were initiated by adding the enzyme and stopped by adding NaHCO 3 to adjust the pH value of the mixture to 9.0, followed by the extraction with an equal volume of EtOAc. ... Planta Medica. ...