| 摘要 |
Compositions that include one or more compounds according to formula I: wherein Y is —S—, or —SO2—; R1 and R1′ are independently chosen from H, —CH3, or a combination thereof; R2 is H, —CH3, or, and m and n are independently chosen from 0, 1, 2, 3, and 4; and one or more photochromic compounds.
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