Patent ID: 8722891

Claim:
A compound represented by formula I: wherein, independently for each occurrence: R represents substituted or unsubstituted naphthalen-1-yl-methyl or anthracene-9-yl-methyl; R 1 represents alkyl or alkenyl; R 2 and R 3 represent alkyl, alkenyl, aryl, cycloalkyl, aralkyl, heteroalkyl, halogen, hydroxy, cyano, amino, acyl, alkoxyl, silyloxy, amino, nitro, thiol, amine, imine, amide, phosphonate, phosphine, carbonyl, carboxyl, silyl, ether, thioether, sulfonyl, selenoether, ketone, aldehyde, or ester; n is an integer from 0 to 5 inclusive; m is an integer from 0 to 8 inclusive; and R 4 represents OR 5 , wherein R 5 is H or alkyl.