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STUDIES ON THE TOTAL SYNTHESES OF MAYTANSINOIDS Ⅱ.PREPARATION OF THE C 9-N MOIETY
ZHOU QI-TING, BAI DONG-LU, SUN HAN-LI, YANG YOU-CHUN, DU YUAN-HUA, Xu YI-BAO, CHEN MEI-QING, GAO YI-SHENG
Acta Chimica Sinica . 1980, (5): 507 -510 .