摘要:
There are disclosed two new antibiotics formerly denominated MC916-A and MC916-B and now called neothramycin A and neothramycin B which are potent inhibitors of the growth of leukemia cells, e.g. Leukema L-1210 cells in mice. They are produced by controlled fermentation of Streptomyces FERM-P 2452 (A.T.C.C. 31123).
摘要:
There are disclosed two new antibiotics formerly denominated MC916-A and MC916-B and now called neothramycin A and neothramycin B which are potent inhibitors of the growth of leukemia cells, e.g. Leukemia L-1210 cells in mice. They are produced by controlled fermentation of Streptomyces FERM-P 2452 (A.T.C.C. 31123).
摘要:
New physiologically active substances, ebelactone A and ebelactone B which are generally termed ebelactone are produced from a new microorganism, Streptomyces MG7-G1 strain identified FERM-P 5363 or ATCC No. 31860 and ATCC No. 31880. Ebelactone is useful as a host defense stimulator having an activity to enhance cell-mediated immunity, and also as an anti-inflammatory agent.
摘要:
New antibiotic designated MF266 substance is now obtained from fermentaton of a new microorganism Streptomyces MF266-g4 (desposited under FERM-P 5401 or ATCC 31910). This new substance is useful as antibacterial agent and/or an antitumor agent for the inhibition of experimental animal tumors.
摘要:
As novel substances having an activity of inducing an apoptosis even on the apoptosis-resistant cancer cells, there are obtained polyoxypeptin and deoxypolyoxypeptin represented by the following general formula (I) wherein R denotes a hydroxyl group for polyoxypeptin, or R denotes a hydrogen atom for deoxypolyoxypeptin, by cultivation of Streptomyces sp. MK498-98F14 strain. Polyoxypeptin and deoxypolyoxypeptin are physiologically active substances which have an activity of inducing apoptosis on a human pancreatic adenocarcinoma cell, AsPC-1 cell.
摘要:
This invention relates to a novel 4'-demethyl-4-epipodophylltoxin derivative of the formula: ##STR1## (wherein R.sub.1 is a lower alkyl group; X.sub.1 and X.sub.2 are each a hydroxyl group or an amino group substituted by one or two lower alkyls, provided that either one of X.sub.1 and X.sub.2 is an amino group substituted by one or two lower alkyls and the other is a hydroxyl group) and salts thereof.
摘要:
N-[4-[(3-aminopropyl)amino]butyl]-2,2-dihydroxyethanamide is an immunostimulant in animals and an intermediate for synthesis of the antibiotic BMG162-aF2.
摘要:
The novel compound represented by the general formula (I) ##STR1## (wherein R represents a hydrogen atom, an alkanoyl group of 1 to 14 carbon atoms, or an arylcarbonyl group), and an acid addition salt thereof [on condition that when R is a hydrogen atom, the hydrochloride exhibits an optical rotation of [.alpha.].sub.D.sup.22 -1.degree. .+-.2.degree. (c, 2 water)] has antitumor activity in experimental animals.
摘要:
A novel, unique nucleoside, 3-.beta.-D-ribofuranosyl-3,6,7,8-tetrahydroimidazo[4,5-d][1,3]diazepin-7-ol, named isocoformycin, of the formula ##STR1## is provided by ring expansion of derivatives of 9-.beta.-D-ribofuranosyl-6-hydroxymethyl-1,6-dihydropurine. Isocoformycin markedly inhibits deaminating enzymes which inactivate formycin and adenine arabinoside (also known as ara-A and Vidarabine). Formycin and adenine arabinoside are used as antiviral and antitumor agents in mammals and birds and isocoformycin is advantageous to prolong the activity and effect of formycin and adenine arabinoside.
摘要:
The novel compound N-[(3-aminoproypl)aminobutyl]-Z-(F-guandino-3-hydroxyheptanamido)-2-methoxyethanamide or a pharmaceutically acceptable salt thereof which has antitumor activity in experimental animals.