Omura , S . , Miyano , K . , Nakagawa , A . , Sano , H . , Komiyama , K . , Umezawa , I . , Shibata , K , Satsumabayashi , S . , ( 1984 ) , " "" Chemical modification and antitumor activity of Herbimycin A . 8 ", 9 - epoxide , 7 , 9 - carbamate , " and 17 or 19 - amino derivatives "". The Journal of Antibiotics ", 37 ( 10 ) , pp 1264 - 1267 .