Patent ID: RE39132

Claim:
A compound of the formula: wherein: Z is CH or N; R is HI or acyl; R 1 , R 2 , R 3 and R 5 may be the same or different and represent H, alkyl or hydrocarbyl arylalkyl having up to 14 carbon atoms; R 4 is H or alkyl having 1-4 carbon atoms with the proviso that: R 4 is alkyl having 1-4 carbon atoms when Z is CH, R 5 is H and R 4 O is attached to the carbon atom labelled 4; and that R 5 is H, when Z is CH, R, R 1 , R 2 , R 3 and R 4 are each H and R 4 O is attached to the carbon atom labeled 3 ; a salt thereof with a pharmaceutically acceptable acid or a pharmaceutically acceptable complex thereof.