2-Piperidinemethanamine22990-77-830 % similar Aminoacetaldehyde dimethyl acetal22483-09-630 % similar (R)-1-Amino-2-propanol2799-16-830 % similar (+)-1-Amino-2-propanol2799-17-930 % similar 1-Aminopropan-2-ol78-96-630 % similar