1-Pyrazinylethanone 131922-02-6 2-ACETYLPYRAZINE 22047-25-2 AI3-34445 Acetylpyrazine EINECS 244-753-5 Ethanone, 1-pyrazinyl- Ethanone, l-pyrazinyl- FEMA No. 3126 Ketone, methyl pyrazinyl Methyl pyrazinyl ketone NSC 72374 Pyrazin-1-ylethan-1-one