130857-09-9 2,6-Methano-3-benzazocin-8-ol, 1,2,3,4,5,6-hexahydro-6,11-dimethyl-3-(2-(1,3-dioxan-2-yl)ethyl-, (2-alpha,6-alpha,11R*)-, (Z)-2-butenedioate (1:1) (salt)