Nen 1937, say sankalaknaban a p-pane-entinademina et inimbento, a tatawagen ya "4000 a serye ya igaganggan la ya onkakana la", kaiba lay 4010, 4020, 40, 40}}}.
Antioxad 4010N: Kabkabat met ya atiociand IPD, N-istrofl-N , mga jabolos-pelemenaminaminamina {5}.
Antioxad 4010: Kabkabat met ya antiociay CPD, N-siklo-N’-N’-N’-en-man-pan-N’-man-pan-N-en-manunaan la # 33.
Antioxad 4020: Kabkabat met ya atiociay 6PD, N-(1 {4} et im-dimelo-N’-N''-N’-N''-la-p-na-po-nen-po-nen-manad{9}.
Antioxt 4030: Kabkabat met ya atiocian 7PD, N, N, N’-bis(1, {4} et tugyopen na kalakal)-na-mata-anta{7}.