3-[N,N-bis(ethoxycarbonylmethyl)aminomethyl]-5-nitrosalicylaldehyde 、
6-[N',N'-bis(ethyloxycarbonylmethyl)aminomethyl]-1,3,3-trimethyl-exo-methyleneindoline 以
乙醇 为溶剂,
生成 Ethyl 2-[[8-[[bis(2-ethoxy-2-oxoethyl)amino]methyl]-1',3',3'-trimethyl-6-nitrospiro[chromene-2,2'-indole]-6'-yl]methyl-(2-ethoxy-2-oxoethyl)amino]acetate