1-Cyclopentene-1-ethanamine, alpha-ethyl-2,3,3-trimethyl-, hydrochloride 2-Amino-1-(2,3,3-trimethylcyclopent-1-en-1-yl)butane hydrochloride 37613-74-4 alpha-Ethyl-2,3,3-trimethyl-1-cyclopentene-1-ethanamine hydrochloride