1. Natural Products Research Centre, Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu People's Republic of China
2. School of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science & Engineering Xueyuan Street 180, Huixing Road Zigong Sichuan 643000 People's Republic of China