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HG/T 4896-2016 橡胶防老剂 N-(1-甲基庚基)-N’-苯基对苯二胺(8PPD) Rubber antioxidant--N-(1-methylheptyl)-...2023-07-21

Synthesis of 2-methylpyrazine from cyclocondensation of ethylene diamine and propylene glycol over p2020-12-22