Patent ID: 7732507

Claim:
A compound of Formula I: or Formula II: wherein X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 are independently O or S; and in compound of formula I at least two and up to all four of X 1 , X 2 , X 3 and X 4 are sulfur; Z is —C m R 2 2m — wherein m=1 to 4; —C(R 2 ) 2 SC(R 2 ) 2 —, —C(R 2 ) 2 SSC(R 2 ) 2 —, or —C(R 2 ) 2 OC(R 2 ) 2 ; n is 1 to 4 in compound of formula I and is 0 to 4 in compound of formula II; M is selected from CH 2 Cl, CH 2 SC(O)R 1 , CH 2 SC(S)R 1 , CH 2 S(CH 2 CH 2 S) q H wherein q is 0, 1 or 2; —CR 2 ═CH 2 , —CH 2 OC(O)CR 2 ═CH 2 , CH 2 N═C═S, CH 2 N═C═O, CH 2 NR 2 H, CH 2 OH, CH 2 SCH 2 CH 2 CR 2 ═CH 2 , phenyl, C(R 2 ) 2 phenyl, furan, thiophene, halogen, C 3 -C 6 cycloalkyl, C 3 -C 6 heretocyclics, thiol, A is O, S or phenyl and x is 0 or 1; wherein R 1 is C 1 -C 22 alkyl; and R 2 is H or C 1 -C 22 alkyl.