乙醛 、
{3-[(5-Amino-5-carboxy-pentyl)-methyl-amino]-propyl}-dimethyl-(3-methylamino-propyl)-ammonium 在
sodium cyanoborohydride 、 sodium phosphate 作用下,
生成 {3-[(5-Carboxy-5-ethylamino-pentyl)-methyl-amino]-propyl}-[3-(ethyl-methyl-amino)-propyl]-dimethyl-ammonium