An operationally simple and efficient method under mild acidic conditions was developed to convert fully protected amino acids to the corresponding zwitterions without either isoelectric precipitation or ion exchange chromatography. Biotage 微波合成儀 Initiator+ Biotage 微波合成儀 Initiator Biotage 微波合成儀 Initiator+ Robot 8 Biotage 微波合成儀 Initiator+ Robot 60