Patent ID: 6943266

Claim:
A compound of the formula and physiologically acceptable salts of the compound, wherein: R 1 is selected from OH; H; OCH 3 ; N 3 ; NH 2 ; O(CH 2 ) n N(CH 3 ) 2 and where n is an integer from 1-3; R 3 is selected from H; OH; OCH 3 ; N 3 and O(CH 2 ) n OH; where n is an integer from 1-5; and R 2 is selected from (CH 2 ) n C≡CH where n is an integer from 3-5, C≡C(CH 2 ) n CH 3 where n is an integer from 2-4, where each X is independently selected from CH 2 , O, S and NH and n is an integer from 3-5, where R is (CH 2 ) n CH 3 and n is a maximum of 7, C(CH 3 ) 2 (CH 2 ) n CH 3 , where n is an integer from 3-5, and (CH 2 ) n CH 3 , where n is an integer from 4-6; with the provisos that: R2 cannot be C(CH 3 ) 2 (CH 2 ) n CH 3 , where n is an integer from 3-5 when R 1 and R 3 are both OH, R2 cannot be (CH 2 ) n CH 3 , where n is an integer from 4-6 when one of R 1 or R 3 is H and the other of R 1 or R 3 is OCH 3 , and R2 cannot be (CH 2 ) n CH 3 , where n is an integer from 4-6 when R 1 and R 3 are both OH.