Keywords: Acetaldehyde ammonia trimer.svg Skeletal formula of acetaldehyde ammonia trimer hexahydro-2 4 6-trimethyl-1 3 5-triazine Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 and Inkscape Own 2007-02-26 Fvasconcellos Six-membered nitrogen heterocycles Saturated nitrogen heterocycles Trimers |