摘要:
A peptide derivative containing 1 to 20 units of peptide unit represented by the following general formula [I] or a pharmaceutically acceptable salt thereof;[Z]--Arg--X--Asp--[Y] [I]wherein Arg represents L- or D-arginine residue, Asp represents L-aspartic acid residue, X represents L- or D-leucine, D-isoleucine, L- or D-norleucine, L- or D-phenylalanine, D-phenylglycine or D-alanine residue, and [Z] and [Y] each represents an amino acid or a peptide residue, which may be present or absent, selected from glycine, L-serine, L-threonine, L- and D-aspartic acid, L-alanine, L- and D-glutamic acid, L-proline residues and a peptide residue constituted by the foregoing amino acid residues, and a pharmaceutical composition comprising the peptide derivative. The composition of the present invention is useful as an agent for inhibiting tumor metastasis.
摘要:
There are disclosed amino acid derivatives represented by the following general formula (I): ##STR1## wherein L.sup.1 and L.sup.2 represent an amino acid residue etc., A.sup.1 and A.sup.3 represent C.dbd.O, A.sup.2 represents an alkylene group etc., m and n represent an integer of 1 to 5, V represents --NHC(.dbd.NH)NH.sub.2 etc., W represents --COOH etc., R.sup.1 and R.sup.2 represent hydrogen atom, alkyl group etc., R.sup.3 and R.sup.4 represent hydrogen etc. and X and Y represent --NH-- or --O-- and pharmaceutically acceptable salts thereof and agents for inhibiting tumor matastasis containing the compounds, and the amino acid derivatives exhibit high activity for inhibiting tumor metastasis and weak platelet aggregation inhibition activity and weak anticoagulation activity.
摘要:
A bis-azo compound represented by the following general formula (1), a tautomer thereof or a salt thereof: ##STR1## wherein R represents a substituted or unsubstituted phenyl group or a substituted or unsubstituted heteroaryl group and X represents a substituted or unsubstituted phenylene group. These compounds exhibit low toxicity and do not have any undesirable effect such as mutagenecity.
摘要:
A polypeptide thin film obtained by polymerizing a monomolecular film comprising a monomer mixture of(a) an amphiphilic compound having a hydrophobic moiety and a hydrophilic moiety having an amino acid ester structure per molecule, the conjugated acid of the elimination group of the ester having a pKa of not higher than 14, and(b) an amphiphilic compound having two amino groups per molecule or an amphiphilic compound having two ester structures per molecule, the conjugated acid of the elimination group of the ester having a pKa of not higher than 16,or a built-up film of the monomolecular film; and a process for preparing a material carrying the polypeptide thin film.
摘要:
A polypeptide thin film produced by polymerizing a monomolecular film or a built-up film comprising an amphipatic phospholipid compound, wherein the amphipatic phospholipid compound has a hydrophobic portion and a hydrophilic portion having an amino acid ester structure in the molecule, the amino acid ester structure containing a splitting-off group with a pKa value of the conjugated acid thereof being 16 or below.
摘要:
A surface-modifiable liposome comprising a compound represented by formula (I) or (II): ##STR1## and a lipid capable of forming a liposome, wherein R.sub.1 represents a hydrophobic group;R.sub.2 and R.sub.3 represent each an organic group including a hydrogen atom) R.sub.2 and R.sub.3 optionally combined with each other to form a double bond or a ring;X and Y each represents an oxygen atom or a sulfur atom; R.sub.2 ' and R.sub.3 ' each represents a hydrogen atom or an organic group; W represents a linking group; n represents 0 or 1; and Z represents a hydrophilic group;and a process for producing a surface-modified liposome by using the surface-modifiable liposome.
摘要:
A polypeptide thin film obtained by polymerizing a monomolecular film comprising an amphiphilic compound having a hydrophobic moiety and a hydrophilic moiety having an amino acid ester structure per molecule, the conjugated acid of the elimination group of said ester having a pKa of not higher than 14, or a built-up film of said monomolecular film; and a process for preparing a material on which said polypeptide thin film is carried.
摘要:
A glycerol derivative or a salt thereof is provided and the derivative is represented by the following general formula (I): ##STR1## wherein n is an integer ranging from 1 to 3; R.sup.1 represents a hydrogen atom or a group: --P(O)(OR.sup.2)(OR.sup.3) wherein R.sup.2 represents a hydrogen atom or a protective group for the phosphoric acid residue and R.sup.3 represents a hydrogen atom, a protective group for the phosphoric acid residue or a hydrophilic group; provided that the phosphoric acid residue represented by R.sup.1 may be in the form of a salt wih a proper counter ion; and, in respect of stereochemistry of asymmetric carbon atoms present in the molecule, the derivative or salt may be either an optically active isomer or a racemic isomer.These compounds are excellent in biological compatibility, dispersibility and chemical stability and that they can provide membranes having high flowability and high barrier properties as compared with conventional phospholipids.
摘要:
A compound represented by the following general formula I; ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent a hygrogen atom, alkyl group or aryl group, provided that at least one of R.sup.1, R.sup.2 and R.sup.3 represents 3,7,11,15-tetramethylhexadecyl group, 3,7,11-trimethyldodecyl group or 3,7-dimethyloctyl group, or a salt thereof. The compound may have R- or S- configuration with respect to each asymmetric carbon contained therein and it may be present as a racemate. The compounds of the present invention are useful as surfactants, lubricants, dispersants, emulsifiers, additives, stabilizers, solubilizers, water-repellants, antistatic agents and the like.
摘要:
A method for image processing executed by an image processing apparatus includes sequentially receiving PDL data and transferring a figure included in the PDL data to processing in a subsequent stage, assigning edge extraction processing as a unit of processing for extracting edge information for each transferred figure, merging the edge information extracted from each figure, spooling the merged data in a tile format as intermediate data, and reading out the intermediate data in the tile format from spooling process and performing processing on each tile to generate a pixel from the intermediate data.