• 2,3-dimethyl pyrazine cas:5910-89-42021-12-16
• 2,5-dimethyl pyrazine cas:123-32-02021-12-16
• 2,6-dimethylpyrazine cas:108-50-92021-12-16
• 2,3,5-trimethyl pyrazine cas:14667-55-12021-12-16