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2,2-Dimethoxy-2-phenylacetophenone is a photoinitiator, which is used to initialise radical polymerisation e.g. in the preparation of acrylate polymers.
References
Liao KC, Hogen-Esch T, Richmond FJ, Marcu L, Clifton W, Loeb GE (2008). "Percutaneous fiber-optic sensor for chronic glucose monitoring in vivo". Biosens Bioelectron. 23 (10): 1458–65.{{cite journal}}: CS1 maint: multiple names: authors list (link)