2-Methoxypyrazine3149-28-831 % similar tert-Butylpyrazine32741-11-031 % similar Vinylpyrazine4177-16-631 % similar Pyrazine-2-carbaldehyde5780-66-531 % similar Benzeneethanethiol4410-99-531 % similar 1-Piperazinylpyrazine34803-68-431 % similar 2,5-Pyrazinediethanol4744-51-830 % similar