Laboratorios Almirall, S.a.

Dolors F Forner

Jacinto M Mauri

Armando V Noverola

Jose P Soto

Carles P Duran

A compound of formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each represents a hydrogen atom or an alkyl group, Z represents a ring selected from: ##STR2## in which n represents 4, 5 or 6; ##STR3## in which R.sup.3 represents hydrogen or an alkyl group and R.sup.4 represents an alkyl, methoxy benzyl or R.sup.5 NHCO group, R.sup.5 being an alkyl group; and ##STR4## in which R.sup.6 represents an alkyl group. and pharmaceutically acceptable salts thereof are useful in the treatment of migraine and other conditions. They are prepares by decarboxylation of the corresponding indolyl 2-carboxylic acid.

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Barcelona, Spain

Dolors F Forner