9-dihydro-proansamitocin 、 alkaline earth salt of/the/ methylsulfuric acid 以
水 、
二甲基亚砜 为溶剂,
以60%的产率得到[(5S,6E,8S,9S,11R,12R,13E,15E)-5,11,20-trihydroxy-12-methoxy-6,8,16-trimethyl-3-oxo-2-azabicyclo[16.3.1]docosa-1(21),6,13,15,18(22),19-hexaen-9-yl] carbamate