| abstract |
Disclosed herein are compounds of formula (I), compositions having compounds of formula (I) and methods of stabilizing a photodegradable polymer or compound in a composition; wherein R1, R2, and R3 are the same or different and are selected from the group consisting of C1 -C30 alkyl, C3-C8 cycloalkyl, substituted alkyl, substituted cycloalkyl, ester, aryl, heteroaryl, heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted heterocycloalkyl, and amino; R4, R5, R6, and R7 are each independently selected from the group consisting of hydrogen and alkoxy, wherein R4 and R5 cannot both be hydrogen and R6 and R7 cannot both be hydrogen; a, b, c, and d are each independently an integer of 1 to 4; n is an integer of 1 to 100; and s is an integer of 0 to 100. |