The present invention relates to a compound according to Formula (I) whereinR.sup.1 is selected from C.sub.1-C.sub.6 alkyl, and said C.sub.1-C.sub.6 alkyl is substituted with C.sub.1-C.sub.6 alkoxy; and at least one of said C.sub.1-C.sub.6 alkyl or said C.sub.1-C.sub.6 alkoxy is branched; or a pharmaceutically acceptable salt thereof, solvate or solvate of a salt thereof, as well as, to compositions containing at least one compound according to Formula (I) and methods of treating at least one disease or condition therewith.