N-methyl-2-pyridin-1-ium-1-ylacetamide,chloride

2-phenylselanylpyridine

pyridine,2,3,4,5-tetrakis(trifluoromethylsulfanyl)-1H-pyrrole

2,2-bis(2,4,6-trimethylphenyl)ethenone

4-氯-2,6-二硝基苯酚