URL：https://media.istockphoto.com/vectors/acetic-acid-molecule-structural-chemical-formula-and-molecule-model-vector-id916636792?k=6&m=916636792&s=170667a&w=0&h=ysMeHt7M1DTU7bLY1NYbAmU70QV0VOWPv3mrI-_dsmg=
掲載元：https://www.istockphoto.com/jp/ベクター/酢酸-分子構造の化学式と分子モデル-gm916636792-252224627
