Patent ID: 8207329

Claim:
A compound of Formula DII: wherein: M is a metal or is absent; X 1 , X 2 , X 3 and X 4 are each independently selected from the group consisting of Se, NH, CH 2 , O and S; Z is halo; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 21 , R 22 , R 31 and R 32 are each independently selected from the group consisting of H, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, cycloalkylalkenyl, cycloalkylalkynyl, heterocyclo, heterocycloalkyl, heterocycloalkenyl, heterocycloalkynyl, aryl, aryloxy, arylalkyl, arylalkenyl, arylalkynyl, heteroaryl, heteroarylalkyl, heteroarylalkenyl, heteroarylalkynyl, alkoxy, halo, mercapto, azido, cyano, acyl, formyl, carboxylic acid, acylamino, ester, amide, hydroxyl, nitro, alkylthio, amino, alkylamino, arylalkylamino, disubstituted amino, acyloxy, sulfoxyl, sulfonyl, sulfonate, sulfonic acid, sulfonamide, urea, alkoxylacylamino, aminoacyloxy, protein, peptide, antibody, nucleic acid, and polyalkylene oxide; wherein each pair of R 1 and R 2 , R 3 and R 4 , R 11 and R 12 , R 13 and R 14 , R 21 and R 22 , or R 31 and R 32 , can together form ═O; wherein R 2 and R 3 can together form a double bond; and R 12 and R 13 can together form a double bond; and wherein each of R 1 and R 2 , R 3 and R 4 , R 11 and R 12 , or R 13 and R 14 , can together form spiroalkyl.