1,6-methano-2-benzazocine, 1,2,3,4,5,6-hexahydro-8-methoxy-2-methyl-, ethanedioate (1:1);8-methoxy-2-methyl-1,2,3,4,5,6-hexahydro-1,6-methano-2-benzazocine ethanedioate (1:1)
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