21-(isocyanatomethyl)-2,3,5,6,8,9,11,12,14,15,17,18-dodecahydrobenzo[b][1,4,7,10,13,16,19]heptaoxacyclohenicosine 、
(R)-1-(4-(aminomethyl)benzyl)-3-(1-phenylethyl)urea 以
二氯甲烷 、
氯仿 为溶剂,
以60%的产率得到1-(2,5,8,11,14,17,20-heptaoxabicyclo[19.4.0]pentacosa-1(21),22,24-trien-23-ylmethyl)-3-[[4-[[[(1R)-1-phenylethyl]carbamoylamino]methyl]phenyl]methyl]urea