In 1937, the most comprehensive p-phenylenediamine anti-aging agent was invented, which was called "4000 series anti-aging agent", including 4010, 4010NA, 4020, 4030.
Antioxidant 4010Na: Sidoo kale loo yaqaan Antioxidant IPD, N-Isopropyl-n, phenyl-p-phymediniatine {{5}
Antioxidant 4010: Sidoo kale loo yaqaan Antioxidant CPD, N-Cyclohehyl-n'-byning-p-phenymediniam .
Antioxidant 4020: Waxaa sidoo kale loo yaqaan Antioxidant 6ppd, N- (1, {{{4 {4 {4 {4 {4 {4 {4 {4 {4 {4 {4 {43- Disiyl-n'ylleri-p-phymediniamine .
Antioxidant 4030: Sidoo kale loo yaqaan Antioxidant 7ppd, n, n'-} (1, {{{{4-) -p-phenymediniamine .