The present invention relates to new compounds of formula I, wherein P, Q, X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.4, R, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, m, n, o, p and q are defined as in any one of claims 1 to 12, a process for their preparation and new intermediates prepared therein, pharmaceutical formulations containing said compounds and to the use of said compounds in therapy.