. . . "e R.sup.5 is hydrogen or methyl, especially hydrogen.Preference is further given to naphtholactam derivatives of the formula I where R.sup.6 is cyano.Preference is further given to naphtholactam derivatives of the formula I where R.sup.7 is C.sub.5 -C.sub.13 -alkyl with or without substitution by phenoxy and with or without interruption by from 1 to 3 oxygen atoms in ether function, or isphenyleth" .