capronic acid = n-hexanoic acid: Friedel-Crafts with toluene (polyphosphoric acid?), followed by bromination and swap bromo with pyrrolidine: MPPH; 1-(4-methylphenyl)-2-(pyrrolidin-1-yl)-hexan-1-one
Potent stimulant, pyrovalerone analog
ethanolamine: possible demethylation of N,N,N-trimethyltryptammonium salt --> DMT
propionic, butyric, etc... with some imagination you'll come up with something