benzyl 1-(diethoxyphosphoryl)-3-methylbutylcarbamate

(E)-N-(3-methylbutylidene)-1,1,1-triphenylmethanamine

(1-amino-3-methyl-butyl)-phosphonic acid dimethyl ester, hydrochloride

dimethyl (3-methyl-1-(tritylamino)butyl)phosphonate

dimethyl (1-(benzhydrylamino)-3-methylbutyl)phosphonate