摘要:
The invention relates to novel peptides of enhanced pharmacological activity of the formula: ##STR1## wherein R.sup.1 is hydroxyalkanoyl,R.sup.2 and R.sup.q are each hydrogen, carboxy, protected carboxy, or a group of the formula: ##STR2## wherein R.sub.a.sup.2 is mono- or di-carboxy (or protected carboxy) lower alkyl or ar(carboxy or protected carboxy) lower alkyl whose aryl moiety may be substituted by hydroxy, R.sup. 2 is hydrogen or lower alkyl; R.sup.p is hydrogen, carboxy, protected carboxy, with proviso that when one of R.sup.2 and R.sup.q is hydrogen, then the other is carboxy or protected carboxy or a group of the formula: ##STR3## wherein R.sub.a.sup.2 and R.sub.b.sup.2 are each as defined above; R.sup.r is hydrogen or amino protective group; m is an integer 1 to 3;or its pharmaceutically acceptable salt.
摘要:
The invention relates to compounds and salts of compounds which are diaminopimelyl peptides, N-acetoxypropionyl or N-t-butoxycarbonyl-amino-acid - (.alpha.-OBzl) glutamic acid peptides or N-acylated derivatives of (.alpha.-OBzl) glytamic acid or of (.alpha.-OBzl) aminoadipic acid.The compounds and their salts are starting materials for the preparation of pharmacologically active peptides.
摘要:
The invention relates to novel intermediates for the preparation of peptides of pharmacological activity, said intermediates being of the formulas: ##STR1## wherein R.sub.2.sup.r is amino protective group andY is hydrogen or amino protective group; and : ##STR2##
摘要:
Nocardicin A is produced by culturing a Nocardicin A producing microorganism in a medium containing at least one of shikimic acid, a hydroxy phenyl carboxylic acid, glycine, alanine, serine, homoserine, .alpha.aminobutyric acid, .alpha., .beta.-diaminoproprionic acid and their ester, acid amide and hydrazide derivatives in a concentration of 2-0.001% by weight.
摘要:
Metal-coated plastic product which comprises a molded product of a mixture of 95 to 20% by weight of a polyester block copolymer and 5 to 80% by weight of a copolymer comprising an acrylic monomer, butadiene and styrene and a layer of a metallic coating which is provided optionally via a layer of an adhesive, and optionally a layer of a top coating. Said metal-coated plastic product has excellent properties such as excellent stiffness, plasticity, processability, and further beautiful and gloss appearance and is useful as a substitute of metallic products.
摘要:
This invention relates to new compounds having antibacterial activity.More particularly, it relates to new antibiotics, Nocardicin E and F and to a process for production of the same by fermentation.
摘要:
An electrothermally deformable levelling pad utilizable in padding, levelling or aligning girders, rails or any other constructional or structural elements. The levelling pad comprises at least one thermoplastic plate member and an electric heater for heating the thermoplastic plate member to soften or melt to cause the overall thickness of the pad to reduce to a value sufficient to bring an article or machine to a predetermined level. The plate member is made of a thermoplastic random-copolymerized polyester which comprises an acid component and a glycol component.
摘要:
Production of antibiotic WS-3442 A, B, C, D and E, and their acyl derivatives thereof, the production of antibiotic WS-3442 A, B, C, D and E being a new method by culturing a new species of Streptomyces and their acyl derivatives of said antibiotics being prepared by acylating said antibiotics with an acylating agent. The acyl derivative of antibiotic WS-3442 A, B, C, D and E has antimicrobiological activity and is also useful for intermediate for preparing Cephalosporin derivatives having antimicrobiological activity.