r 80a 2 perhaloalkyl u2014 cn u2014 no 2 u2014 co 2 c 1 6 alkyl u2014 co 2 h or u2014 c o nr 80a r 80a where each r 80a is independently h or c 1 6 alkyl and the remaining variables are as defined for formula v in one embodiment at least one of r 40 is u2014 co 2 h in one embodiment the u2014 oc 1 6 alkyl on the ring bearing r 2a is para to the corresponding benzyl methylene in one embodiment the u2014 oc 1 6 alkyl on the ring bearing r 2a is u2014 och 3 or u2014 och 2 ch 3 and is para to the corresponding benzyl methylene in any of the aforementioned embodiments the indol 1 yl group ring a is attached to the parent indolyl at the 5 or 6 yl position in one embodiment r 3 and r 4 are h another embodiment is a compound or pharmaceutically acceptable salt thereof from table 1 or from table 2 the compounds in table 1 and table 2 were prepared as described in the experimental section below but could also be prepared in other ways as would be understood by one of ordinary skill in the.