(+)-GR24 is a (3E)-3-{[(4-methyl-5-oxo-2,5-dihydrofuran-2-yl)oxy]methylidene}-3,3a,4,8b-tetrahydro-2H-indeno[1,2-b]furan-2-one that has (3E,3aR,8bS) configuration in the indenofuranone moiety and R at the chiral centre in the furanone ring. It is a synthetic strigolactone and a (3E)-3-{[(4-methyl-5-oxo-2,5-dihydrofuran-2-yl)oxy]methylidene}-3,3a,4,8b-tetrahydro-2H-indeno[1,2-b]furan-2-one. It is an enantiomer of a (-)-GR24.

Momilactone A is a pimarane diterpenoid and a diterpene lactone.