The condensation of catechols with ethylenediamine.
D002396:Catechols / Q000737:chemistry*; D005029:Ethylenediamines / Q000737:chemistry*
D002396:Catechols; D005029:Ethylenediamines; C031234:ethylenediamine; C034221:catechol
CATECHOL/chemistry; ETHYLENEDIAMINES/chemistry