| prov:value
| - In the 3-ring compounds of the formulae IfCl.F3, Z11 and Z12 independently of one another are a single bond, --COO--, --OCO--, or --CH2 CH2 --; one of the bridge groups Z11 and Z12 is preferably a single bond. ##STR50## are preferably independently of one another Phe, Phe.F, Cyc, Pyr, Pyd or Dio; if one of ##STR51## is a heterocyclic compound, the other ring is preferably Phe, Phe.F or Cyc and in
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