Compounds of Formula I: (where variables R1, R2, R3, R7, G, J, Q, T, W, X
and Y are as defined herein) useful as antagonists of CGRP receptors and
useful in the treatment or prevention of diseases in which the CGRP is
involved, such as headache, migraine and cluster headache, and
pharmaceutical compositions comprising these compounds and the use of
these compounds and compositions in the prevention or treatment of such
diseases in which CGRP is involved. ##STR00001##