海量图书期刊资源，随时随地畅享阅读乐趣
Studies on β-lactam antibiotics II. A new synthesis of 1,2-secopenicillin and its conversion to the cepham nucleusMasafumi Yoshimoto; Sadao Ishihara; Eiji Nakayama; Emiko Shoji; Harumitsu Kuwano; Nobuo Soma · 1972