Dans de nombreux pays du monde entier, Synthelabo a déposé la marque/le nom commercial "Synthelabo" et Syntex, les marques Syntex, Syntrex, Syndrex, Synodex et Synlexan.
The agreement was concluded between them in an effort to prevent confusion between their trademarks. Synthelabo holds registrations of its trademark and trade name in many countries worldwide, whereas Syntex holds registrations for Syntex, Syntrex, Syndrex, Synodex and Synlexan.