The invention discloses and claims a compound of formula (I): ##STR00001##
Wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7,
R.sub.8 and R.sub.11 are as defined herein. Further embodiments of the
invention include a method of preparation of a compound of formula (I),
its pharmaceutical composition and a method of treatment of a disease
using a compound of formula (I).