varenicline molecule 3d rendering, flat molecular structure with chemical formula and atoms color coding

varenicline autonomic drugs miscellaneous chantix champix smoking cessation eye disease nicotinic receptor agonist molecule molecular structure chemical formula model c13h13n3 atom chemistry addiction cardiovascular composition depression medicine suicide tobacco nicotine nitrogen carbon atomic hydrogen cytisine tartrate vareniclin skeletal compound generic material pharmaceutical pharmacy science therapy rendering flat atoms color coding coding