A composition includes: a metal compound including a ligand; and a solvent. The ligand is derived from a compound represented by formula (1). L represents an oxygen atom or a single bond; R1 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms; R2 and R3 each independently represent a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, or R2 and R3 bind with each other and represent an alicyclic structure having 3 to 20 ring atoms together with the carbon atom to which R2 and R3 bond, or le and either R2 or R3 bind with each other and represent a lactone ring structure having 4 to 20 ring atoms or a cyclic ketone structure having 4 to 20 ring atoms together with the atom chain to which le and either R2 or R3 bond.