Patent ID: 7692030

Claim:
A compound having the formula (I): wherein L is —R—, or —O—R—, and R is selected from the group consisting of: (a) substituted or unsubstituted arylene; (b) substituted or unsubstituted heteroarylene; (c) substituted or unsubstituted alkylene; (d) substituted or unsubstituted alkenylene; and (e) substituted or unsubstituted alkynylene; R 1 is selected from the group consisting of: (a) hydrogen; (b) substituted or unsubstituted alkyl; (c) substituted or unsubstituted aryl; (d) substituted or unsubstituted heteroaryl; (e) substituted or unsubstituted alkenyl; and (f) substituted or unsubstituted alkynyl; and R 2 is selected from the group consisting of: (a) substituted or unsubstituted alkyl; (b) substituted or unsubstituted aryl; (c) substituted or unsubstituted heteroaryl; (d) substituted or unsubstituted alkenyl; and (e) substituted or unsubstituted alkynyl.