New hydrolase substrates

A compound of the formula ##STR5## wherein one of Z and A is an orthophosphoric or a pyrophosphoric acid residue or a sulphuric acid residue;

• the other of Z and A is an orthophophosphoric, pyrophosphoric or a sulphuric acid residue;
• a saturated or unsaturated (C.sub.1 -C.sub.20)-alkylcarbonyl;
• an amino acid or an oligopeptide residue bound by their carboxylic acid ends;
• or, if Z is an orthophosphoric, pyrophosphoric or sulphuric acid residue, A may also be (C.sub.1 -C.sub.7)-alkylcarbonyl, optionally unsaturated, which is substituted one or more times by hydroxyl, carboxyl or an ammonium group;
• B is a (C.sub.1 -C.sub.7)-alkylcarbonyl optionally substituted one or more times by hydroxyl, carboxyl or an ammonium group;
• each of R.sup.2 and R.sup.5 is hydrogen, halogen or (C.sub.1 -C.sub.5)-alkyl;
• each of R.sup.1, R.sup.3, R.sup.4 and R.sup.6 is hydrogen;
• halogen, cyano;
• (C.sub.1 -C.sub.5)-alkyl;
• (C.sub.1 -C.sub.5)-alkoxy;
• carboxyl;
• (C.sub.1 -C.sub.5)-alkoxycarbonyl;
• carboxy-(C.sub.1 -C.sub.5)-alkyl;
• (C.sub.1 -C.sub.5)-alkoxycarbonyl-(C.sub.1 -C.sub.5)-alkyl;
• carboxamido optionally substituted once or twice by (C.sub.1 -C.sub.5)-alkyl, (C.sub.1 -C.sub.5)-alkoxy-(C.sub.1 -C.sub.5)-alkyl, carboxy-(C.sub.1 -C.sub.5)-alkyl or (C.sub.1 -C.sub.5)-alkoxycarbonyl-(C.sub.1 -C.sub.5)-alkyl), or in the case of disubstitution, the two substitutents can be joined to form a ring which can be interrupted by oxygen, nitrogen and sulphur atoms;
• or a radical of the formula
• --COO--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.7
• in which R.sup.7 is a hydrogen or (C.sub.1 -C.sub.5)-alkyl, and n is a whole number of from 1 to 4;
• and
• R.sup.6 can also be sulpho or nitro.