1-(((2-butylhexanoyl)oxy)methyl)-1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-ium iodide 、 Iodomethyl 2-decyldodecanoate 以to give Compound 53 (2.33 g, 61%)的产率得到1-(((2-decyldodecanoyl)oxy)methyl)-1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-ium iodide