3,9-Bis(2-acryloyloxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane

2-Propenoic acid, 2, 4, 8, 10-tetraoxaspiro[5.5]undecane-3, 9-diylbis(2, 2-dimethyl-2, 1-ethanediyl)ester