The present invention relates to tri-acylated GLP-1 derivatives, acylated at positions corresponding to positions (18, 22, 30), (18, 26, 37), (18, 27, 37), (26, 30, 37), or (27, 30, 37) of the native human glucagon-like peptide 1 (GLP-1 (7-37) (SEQ ID NO: 1)； or pharmaceutically acceptable salts, amides, or esters thereof. The acylated side chains comprise a protracting moiety selected from Chem. 1: HOOC—(CH2)16—CO—*, Chem. 1a: HOOC—(CH2)18—CO—*, and Chem. 2: HO3S—(CH2)15—CO—*, and the protracting moieties are connected, via a linker, to a Lys residue of the GLP-1 peptide. The GLP-1 peptide has a maximum of seven amino acid changes as compared to GLP-1 (7-37) (SEQ ID NO: 1). The invention also relates to intermediate products in the form of novel GLP-1 analogs, as well as to pharmaceutical compositions and uses of the derivatives and analogs, in particular for the treatment of type 2 diabetes. The derivatives have very long half-lives while maintaining a satisfactory potency, which makes them potentially suitable for once-monthly administration.
