PROBLEM TO BE SOLVED: To provide compounds having a proliferation-suppressing effect against cancer cells and drugs containing the compounds as an effective ingredient and being effective in e.g. treating cancer.SOLUTION: There are provided macrodiolide compounds of formula (2) and drugs containing the compounds as an effective ingredient and being effective in e.g. treating cancer.COPYRIGHT: (C)2013,JPO&INPIT【課題】癌細胞に対する増殖抑制作用を有する化合物、及びこれを有効成分とする癌治療等に有効な医薬の提供。【解決手段】以下の式(2)で表されるマクロジオライド化合物及びこれを有効成分とする癌治療等に有効な医薬。【選択図】なし