摘要:
Peptides having vasopressin antagonist activity are prepared by a peptide synthesizer to insert a N-methylarginine at the 7-position of the structure. An example of this series of compounds is [1-(.beta.-mercapto-.beta.,.beta.-cyclopentamethylenepropionic acid)-2-(O-ethyl-D-tyrosine)-4-valine-7-desproline-8-N-methylarginine-9-desglycine]-vasopressin.
摘要:
A pharmaceutical composition containing a hydrophilic drug which is poorly absorbable through the gastrointestinal tract, and cyclodextrin, increases the absorbability of the drug into the mammalian body when administered by a non-oral or non-injection route.
摘要:
Certain vasopressin-like peptides, which have an acyclic unit at position 1 and which have an .omega.-amino- or guanidinoalkyl substituent attached to the cysteine in the 6-position of the ring, have V.sub.1 -vasopressin and oxytocin antagonist activity. A species of this series of new compounds is [1-desaminopenicillamine-2-(O-ethyl-D-tyrosine)-8-(1,4-diaminobutane)-9-desglycinamide]-vasopressin.
摘要:
Compounds acting as antagonists of the antidiuretic/and or vasopressor activity of arginine vasopressin are those of the formula ##STR1## wherein n is 4 or 5; X is (D- or L-)Tyr(R), D-Phe, D-Val, D-Leu, D-lle, D-Nva, D-Nle, D-Cha, D-Abu, D-Thr, D-Asn, D-Met or D-Gln; Y is Val, lle, Thr, Ala, Lys, Cha, Nva, Met, Nle, Orn, Ser, Asn, Gln, Phe, Tyr, Gly, Abu or Leu; Z is (D- or L-) Arg, Orn or Lys; Q is Arg(NH.sub.2), Ser(NH.sub.2), (D- or L-)Ala(NH.sub.2), Gly, OH or NH.sub.2 and R is methyl, ethyl, propyl or butyl; provided that, when Y is Gln or Val, R may also be H. Further compounds are those wherein Q is Orn(NH.sub.2), NHCH.sub.2 CH.sub.2 NH.sub.2, Val(NH.sub.2), Phe(NH.sub.2), lle(NH.sub.2), Thr(NH.sub.2), Pro(NH.sub.2) or Tyr(NH.sub.2).
摘要:
Certain cyclic vasopressin-like peptides, which have an .omega.-amino- or guanidinoalkyl substituent attached to the cysteine in the 6-position of the ring, have vasopressin antagonist activity. A species of this series of new compounds is [1-(.beta.-mercapto-.beta.,.beta.-cyclopentamethylenepropionic acid)-2-(O-ethyl-D-tyrosine)-4-valine-8-(1,5-diaminopentane)-8-desarginine-9-desglycinamide]-vasopressin.
摘要:
Stepwise synthesis in solution and cyclization by means of active esters or another method suitable for peptide bond formation were used to prepare analogues of deamino-vasopressin with the disulphide bridge altered to the thioether group. In sequence position 8 of the peptide chain the analogs differed by the nature of basic amino acid. Typical vasopressin-like activities, mainly antidiuretic, were very high in these analogs; of particular importance will be their haemodynamic activity.