Urea Formula:CH4N2O CAS#:57-13-6 MW:60.1 [MS] Jmol._Canvas2D (Jmol) "jmolApplet0"[x] Dots surface: no dotsvanderWaals dots surfacesolvent-accessible surfaceSpacefill:spacefill offspacefill 20%spacefill 95%Wireframe:wireframe offwireframe onwireframe .15wireframe .25wireframe .5background ivorybackground whitebackground blackbackground yellowbackground salmonbackground palegreenbackground skyblueRed blue stereo on/offElement label on/off Species utilize Urea in its chemical communication system Carnivora, Felidae, Felinae, Acinonychini Acinonyx jubatus P �Category of the chemical signal A - Attractant Al - Allomone K - Kairomone P - Pheromone Sy - Synomone� �(*) indicates that compound is active� Cheetah Carnivora, Felidae, Pantherinae, Pantherini Panthera tigris altaica P �Category of the chemical signal A - Attractant Al - Allomone K - Kairomone P - Pheromone Sy - Synomone� �(*) indicates that compound is active� Siberian tiger