In 1937 woort ‘t mies oetgebreide p-fenediamine anti-aging agent oetgevoonde, waat “4000-serie anti-aging agent” woort geneump, boe-oonder 4010, 4010NA, 4020, 4030.
Antioxidant 4010NA: Ouch bekind es antioxidant IPPD, N-isopropyl-N, fenyl-p-fenylenediamine.
Antioxidant 4010: Ouch bekind es antioxidant CPPD, N-cyclohexyl-N'-fenyl-p-fenylenediamenáts
Antioxidant 4020: Ouch bekind es antioxidant 6PPD, N-(1,{4}-dimethyl)butyl-N'-fenyl-p-fenylenediamineente{n9}}
Antioxidant 4030: Ouch bekind es antioxidant 70PD, N, N-bis (nère,{4}-dimtylpentyl)-p-fenylenediaamine