PROBLEM TO BE SOLVED: To provide morphinan compounds useful for treating drug toxicity and drug overdose, particularly overdose of opioid.SOLUTION: This invention relates to malate of compound-1 represented by the following formula.【課題】薬物毒性および薬物過量摂取、特にオピオイドの過量摂取の治療に有用なモルヒナン化合物の提供。【解決手段】下記の式で表される化合物-1のリンゴ酸塩。【選択図】なし