H-Val-nh2 hcl3014-80-030 % similar 2,4,4-Trimethylcyclopentanone4694-12-630 % similar tert-Butyl 2-carbamoylpiperidine-1-carboxylate388077-74-530 % similar (S)-1-N-Boc-piperidine-2-carboxamide78058-41-030 % similar 3-Carbamoyl-piperidine-1-carboxylic acid tert-butyl ester91419-49-730 % similar 1-Bromo-3-methylbutan-2-one19967-55-630 % similar