Abstract: The invention relates to cholecystokinin (CCK) derivatives of the general formula I: P-L-X1-X2-X3-Gly-Trp-X6-DMeAsp-X8-NH2, wherein P is Chem. 1: HOOC—(CH2)x—CO—*, wherein x is an integer in the range of 12-18; L is absent, or L comprises at least one linker element selected from Chem. 2: *—NH—CH(COOH)—(CH2)2—CO—*, Chem. 3: *—NH—(CH2)2—[O—(CH2)2]k—O—[CH2]n—CO—* wherein k is an integer in the range of 1-11 and n is an integer in the range of 1-5, Chem. 4: *—NH—CH(CH2OH)—CO—*, Chem. 5: *—NH—CH2—CO—*, and/or Chem. 6: *—NH—CH[(CH2)4—NH2]—CO—*; X1 is absent, Asp, DAsp, bAsp, DbAsp, Glu, or DGlu; X2 is Phe(4-sulfomethyl) or sTyr; X3 is Nle, Leu, Ala, Ile, Lys, Arg, Pro, Met, Phe, Ser, His, or Val; X6 is Nle, Ile, Gln, Met, Met(O2), Leu, Val, Pro, Hpg, or Ala; X8 is Phe, MePhe, 1Nal, Me1Nal, 2Nal, Me2Nal, Trp, or MeTrp. The invention also relates to the corresponding CCK peptides, as well as to methods for preparing the peptides and the derivatives.