| abstract |
Urea derivatives of formula (1) which comprise piperidine or piperazine ring. Each of A and B is independently hydrogen; alkyl; a 6membered aromatic or nonaromatic, carbocyclic or heterocyclic moiety; an aminoalkyl or an aminoalkenyl; wherein only one of A and B may be hydrogen or alkyl. RI is H, alkyl, alkenyl or alkynyl. Z is N or CHNR2. Each of R3 may be a variety of substituents. Each of R4 may be H or alkyl. Each Ar is a 6-membered or fused aromatic system optionally containing nitrogen atoms; m is 0-3 and n is 0-2. These compounds are effective in ameliorating conditions characterized by unwanted calcium channel activity. |