noun ダウンロード 🔗共有 ペンチル基 Any of several isomeric univalent hydrocarbon radicals, C5H11, formally derived from pentane by the loss of a hydrogen atom. Examples : "The chemical formula for the pentyl group attached to that molecule is C5H11. " その分子に結合したペンチル基の化学式はC5H11です。 compound chemistry substance technical AIとチャット語彙ゲーム読解練習