Compounds of the naphthalimide series

A compound of the formula ##SPC13##

• in which R is alkyl of 1 to 18 carbon atoms, allyl, cycloalkyl, cycloalkyl of 5 to 8 carbon atoms, phenylalkyl of 1 to 4 carbon atoms in the alkyl, hydroxyalkyl of 2 or 3 carbon atoms, alkoxyalkyl of 2 or 3 carbon atoms in the alkyl and 1 to 8 carbon atoms in the alkoxy, phenoxyalkyl of 2 or 3 carbon atoms in the alkyl, cyanoethyl, chloroethyl, bromoethyl, chloropropyl, bromopropyl, alkoxycarbonylethyl of 1 to 8 carbon atoms in the alkoxy, .beta.-carbamoylethyl, alkoxycarbonylmethyl of 1 to 8 carbon atoms in the alkoxy, ##EQU7## n is 2, 3 or 4;
• B is hydrogen or alkyl of 1 to 4 carbon atoms;
• B.sup.1 is hydroxy, alkoxy of 1 to 8 carbon atoms, .beta.-alkoxyethoxy of 1 to 4 carbon atoms in the alkoxy, phenoxy, phenoxy substituted by chloro, methyl or methoxy, phenylmercapto or methoxyphenylmercapto;
• and R.sup.1 is alkyl of 1 to 6 carbon atoms, hydroxyalkyl of 2 to 6 carbon atoms, alkoxyalkyl of 1 to 4 carbon atoms in the alkoxy and 2 to 6 carbon atoms in the alkyl or (CH.sub.2 CH.sub.2 O).sub.n B.