摘要:
Investigation of the activity of extracts of the clam Spisula polynyma has led to antitumor long-chain, straight-chain alkane compounds which have a 2-amino group and a 3-hydroxy group. Compositions and methods comprising an isolated and purified long-chain, straight-chain 2-amino-3-hydroxyalkane, or prodrug thereof, and a pharmaceutically acceptable carrier are also described, wherein the carbon chain in the long-chain, straight-chain 2-amino-3-hydroxyalkane is C16-C24.
摘要:
Investigation of the activity of extracts of the clam Spisula polynyma has led to antitumour long-chain, straight-chain alkane or alkene compounds which have a 2-amino group and a 3-hydroxy group.
摘要:
A method of producing a plastic sheet-strap includes the steps of providing first and second work rollers such that the work rollers rotate in opposite directions and at different lineal surface velocities. The work rollers are spaced apart with respect to each other so as to define a work roller nip therebetween. A pinch roller is provided that is operably associated with the first work roller. The pinch roller and the first roller defining a deaerating nip therebetween. A solid sheet of material having a thickness is fed into the deaerating nip. The material is pinched against the first work roller and moves with rotation of the first work roller to the work roller nip between the first and second work rollers. The material is simultaneously milled and stretched substantially at the nip during a single pass of the solid sheet material through the nip as the rollers rotate in opposite directions and at different lineal surface velocities to form a milled and stretched oriented sheet. The second roller has a concave profile to work the edges of the sheet more than a central region of the sheet. A chill roller is disposed downstream of the second work roller to cool the milled and stretched oriented sheet.
摘要:
Dehydrodidemnin B with useful biological activity has formula (1). It can be isolated from natural sources or synthesized, and it forms active derivatives.
摘要:
The present invention relates to pharmaceutical compositions comprising matter extracted from the well-known and readily available tropical marine invertebrate, Ecteinascidia turbinata, and designated herein as ecteinascidins, and to the use of such compositions as antibacterial, anti-viral, and/or antitumor agents in mammals.
摘要:
A bear derived isolate found in denning black bears or black bears from which food has been withheld for at least two weeks when injected into another mammal produces reduced heart rate, reduced respiratory rate, reduced temperature, and a wakeful tranquility not unlike the phenomena of the denning black bear. The isolate is taken from either the serum or urine of such denning bear. The method of the invention involves the steps of fractionating the serum or urine of a denning black bear to produce fractions of varying potency.
摘要:
The present invention is directed to several newly discovered ecteinascidin (Et) species, designated herein as Et 731, Et 745B, Et 815, Et 808, Et 596, Et 597, Et 583, Et 594 and a synthetic derivative of Et 594, N-Acetyl Et 597. The physical properties of these compounds, their preparation and bioactivities are also reported.
摘要:
The purification and structure elucidation of several products of the metabolism of Et 743 by human cytochrome CYP3A4 have been accomplished. These compounds are abbreviated herein as “ETM” followed by a numeric value which represents the approximate molecular weight. Three compounds have been identified to date, namely ETM 305, ETM 775 and ETM 204. The structures of these ecteinascidin metabolites are as follows:
摘要:
Ecteinascidins 722 and 736 (Et's 722 and 736) have been isolated from the Caribbean tunicate Ecteinascidia turbinata and their structures have been assigned as tetrahydro-.beta.-carboline-substituted bis(tetrahydro- isoquinolines) related to the previously reported Et's 729 and 743. Et's 722 and 736 protect mice in vivo at very low concentrations against P388 lymphoma, B16 melanoma, and Lewis lung carcinoma.