The molecule is a butan-4-olide having a methylidene group at the 3-position and a 9-(2,3-dihydroxyphenyl)nonyl substituent at the 5-position. It is a butan-4-olide and a member of catechols.
5-[9-(2,3-dihydroxyphenyl)nonyl]-3-methylideneoxolan-2-one