Abstract: A photochemotherapeutic compound of the formula ##STR1## wherein (i) n is zero, W is a (C.sub.1-16) alkyl, alkenyl, or alkynyl linear or branched chain hydrocarbon, having no more than four O, N, or S atoms in or attached to the chain; or(ii) n is 1, W is CR or CR.sub.2, and R, R', and R" are independently H or CH.sub.3 ; or(iii) N is 2, W is CR or CR.sub.2, and R, R', and R" are independently H or CH.sub.3 ; andA, B, C, and D are independently selected from hydrogen, alkyl, aryl, halogen, amino, aminoalkyl, nitro, alkoxy, aryloxy, hydroxy, carboxy, haloalkyl, or haloalkoxy, particularly compounds of the foregoing structure in which W is a charged substiuent and n=0 or 1.