| abstract |
Dipeptides having the formula (I): <CHEM> wherein R represents a hydrogen atom or an amino-protecting group, Y represents a hydrogen atom, a hydroxy group or a protected hydroxy group and X represents an acidic amino acid residue or a protected acidic amino acid residue having at least one protecting group; or a horticulturally or agriculturally acceptable salt thereof. These substances are useful as plant growth regulators. |