Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C10H7ClN2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 20375-65-9
Total synthesis and biological evaluation of grassypeptolide A
Herein, we describe in full our investigations into the synthesis of grassypeptolide A (1) in 17 linear steps with an overall yield of 11.3 %. In particular, this work features the late-stage introduction of sensitive bis(thiazoline) heterocycles and 31-membered macrocyclization conducted at the sterically congested secondary amide site in superb conversion (72 % yield). Biological evaluation indicated that grassypeptolide A significantly inhibited cancer cell proliferation in a dose-dependent manner. It induced cancer cell apoptosis, which was associated with increased cleavage of poly(ADP-ribose) polymerase (PARP) and decreased expression of bcl-2 and bcl-xL. Furthermore, grassypeptolide A also caused cell cycle redistribution by increasing cells in the G1 phase and decreasing cells in the S and G2 phases. In addition, cell cycle arrest was correlated with downregulation of cyclin D and upregulation of p27 and p21. Cytotoxic activity: Synthesis of grassypeptolide A, an anticancer marine cyclodepsipeptide, in 17 linear steps with an overall yield of 11.3 % is described (see figure). Subsequent biological evaluation indicated that grassypeptolide A significantly inhibited cancer-cell proliferation in a dose-dependent manner. Copyright
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Pyridazine – Wikipedia,
Pyridazine | C4H4N2687 – PubChem