Pyrrolophenylalkanolamines as animal yield promoters

A pyrrolophenylalkanolamine of the formula ##STR182## in which R.sup.1 represents one or more identical or different radicals from the group comprising hydrogen, halogen, cyano, formyl, nitro, carboxyl, carbalkoxyalkyl, alkoxycarboxyalkyl, alkylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkyl, alkoxy, alkenoxy, halogenoalkyl, halogenoalkoxy, alkylthio, halogenoalkylthio, hydroxyalkyl, cyanoalkyl, alkoxyalkyl, alkylthioalkyl and alkylcarbonylalkoxy,

• R.sup.2 represents one or more identical or different radicals from the group comprising hydrogen, hydroxyl, halogen, cyano, nitro, alkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy, halogenoalkylthio, cyanoalkyl, alkoxyalkyl, hydroxyalkyl, alkoxycarbonyl, aminocarbonyl and mono- and dialkylaminocarbonyl,
• R.sup.3 represents hydrogen, C.sub.1-6 -alkylcarbonyl, benzoyl, C.sub.1-6 -alkylsulphonyl, phenylsulphonyl or trialkylsilyl,
• R.sup.4 represents hydrogen or alkyl,
• R.sup.5 represents hydrogen, or, together with R.sup.3, represents ##STR183## R.sup.7 represents hydrogen or alkyl, and R.sup.6 represents straight-chain or branched alkyl or cycloalkyl, which has up to 12 C atoms and is optionally substituted by heterocyclic of 4 to 6 ring atoms consisting of 1 or 2, O or S atoms and the rest carbons, C.sub.1-6 -alkoxy, C.sub.1-4 -alkylthio or halogen, or represents cyclo-alkyl-alkyl which has up to 12 C atoms and is optionally substituted by halogen, C.sub.1-4 -alkoxy or C.sub.1-4 -alkylthio,
• or a salt thereof.