2-Propenoic acid, 2-methyl-, 7-oxo-1,3,5-cycloheptatrien-1-yl ester, homopolymer (9CI) 29832-29-9 NSC 83678 Poly(2-((7-oxo-1,3,5-cycloheptatrien-1-yloxy)carbonyl)-2-methylethylene)