1,6-Methano-2-benzazocine, 1,2,3,4,5,6-hexahydro-8-methoxy-2-methyl-, oxalate 2'-Methoxy-2-methyl-1,2,3,4,5,6-hexahydro-1,6-methano-2-benzazocine oxalate 76777-11-2 8-Methoxy-2-methyl-1,2,3,4,5,6-hexahydro-1,6-methano-2-benzazocine oxalate