1 C40 N-[(2r,4s,5s,7r)-4-amino-8-(butylamino)-5-hydroxy-2,7-dimethyl-8-oxooctyl]-2-(3-methoxypropoxy)benzamide 1.000 2 C39 N-[(2s,4s,5s,7r)-4-amino-8-(butylamino)-5-hydroxy-7-methyl-2-(1-methylethyl)-8-oxooctyl]-2-(3-methoxypropoxy)benzamide 0.943