SEARCH Articles Figures Tables 1 -Benzyl-3.5-dichloro-2 -pyrazinone 1 -Benzyl-5-chloro-3-phenyl-2 pyrazinone 1- Benzyl-2 -pyrazinone 4-oxide 6-Amino-5-benzyl-3-methyl-2 pyrazinone Pyrazinone Pyrazinones