2-amino-3-cyano-5-phenylpyrazin-1-ium-1-olate 50627-20-8, Information for 2-amino-3-cyano-5-phenylpyrazin-1-ium-1-olate 50627-20-8, Suppliers of 2-amino-3-cyano-5-phenylpyrazin-1-ium-1-olate 50627-20-8