α-Cyclopropylcyclopropanemethanamine13375-29-6100 % similar trans-1,4-Diaminocyclohexane2615-25-033 % similar 1,4-Diaminocyclohexane3114-70-333 % similar Cyclopropylamine765-30-033 % similar Cyclohexylammonium bromide26227-54-330 % similar