2-Propenoic acid, 3-(3-furanylmethyl)-1,2,3,4,5,6-hexahydro-6,11-dimethyl-2,6-methano-3-benzazocin-8-yl ester, hydrochloride (2R-(2-alpha,6-alpha,11R*))-, polymer with 2-propenanamide 65452-11-1