Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Peptide containing doai
Patent
1985-11-08
1987-11-17
Phillips, Delbert R.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Peptide containing doai
514809, 530302, 530328, 530329, H61K 3702, C07K 712, C07K 706
Patent
active
047074680
ABSTRACT:
A novel polypeptide is defined by the below shown formula and is useful as an analgesic. ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom or a lower alkyl or lower alkenyl group, A represents a D-amino acid, Gly or Sar provided that when the D-amino acid is D-Cys, it is bonded with L-Cys or D-Cys in position 5 through a S--S bond to effect intramolecular ring closure, B represents L-Phe or D-Phe in which the benzene ring may be substituted or an .alpha.-N-alkyl derivative thereof, C represents an L-amino acid, D-Cys or an .alpha.-N-alkyl derivative thereof, D and E each represent an L- or D-basic amino acid or an .alpha.-N-alkyl derivative thereof, F represents a group of the formula --OR.sup.3 (in which R.sup.3 is H or a lower alkyl group), a group of the formula: ##STR2## (in which R.sup.4 and R.sup.5 are the same or different and each represents H or a lower alkyl group), a group of the formula: --G--OR.sup.6 (in which G is an L- or D-amino acid or Gly or an .alpha.-N-alkyl derivative thereof and R.sup.6 represents H or a lower alkyl group), a group of the formula: ##STR3## (in which G is as defined above and R.sup.7 and R.sup.8 may be the same or different and each represents H or a lower alkyl group), a group of the formula: --G--L--Arg--OR.sup.9 or --G--D--Arg--OR.sup.9 (in which G is as defined above and R.sup.9 represents H or a lower alkyl group or a group of the formula: ##STR4## (in which G is as defined above and R.sup.10 and R.sup.11 may be the same or different and each represents H or a lower alkyl group), a group of the formula: --G--J--OR.sup.12 in which G is defined as above, J is a neutral amono acid group or an acidic amino acid group and R.sup.12 is hydrogen or a lower alkyl group; or a group of the formula: --G--Arg--M--OR.sup.13 in which M is D-amino acid group and R.sup.13 is hydrogen or a lower alkyl group, provided that all of the amino acids constituting the polypeptide of the above formula do not represent at the same time an L-amino acid of the general formula: ##STR5## (in which R represents a group corresponding to a structural formula of an amino acid deprived of a group of the formula: ##STR6## or pharmacologically acceptable salts of them.
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Arakawa Yoshihiro
Araki Shin
Ikeda Masuhiro
Kaneko Takeru
Nakazawa Takahiro
Eisai Co. Ltd.
Phillips Delbert R.
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