這個是天然物分析的短文 請英文好的能夠幫忙翻譯 感恩大家
Extraction and Isolation. Dried fruits from the tree described above (245 g) were extracted with EtOH to give 24.1 g of extract, which was assigned the number MG2180. A total of 1.64 g of extract was supplied to VPISU,
and this had an IC50 value of 21 μg/mL against A2780 cells. Aportion of this extract (1.0 g) was suspended in aqueous MeOH (90%MeOH-H2O, 40 mL) and extracted with hexanes (3 × 40 mL).
The aqueous layer was then diluted to 60% MeOH (v/v) with H2O and extracted with CH2Cl2 (3 × 60 mL). The CH2Cl2 extract (401.9 mg) was found to be the most active (IC50 ) 16 μg/mL) and was separated via preparative HPLC over a Phenyl column using MeOH-H2O (70:30) to afford 11 fractions (I-XI), of which fractions VI-VIII were
found to display the highest antiproliferative activity (IC50 ) 12, 13, and 12 μg/mL, respectively). Fraction VI was further separated via semipreparative HPLC on a Phenyl column using MeOH-H2O (70:30).
Six fractions (A-F) were collected. Fraction D afforded cordylane B (2, 2.0mg, tR 26.7 min), while fraction E afforded cordylane A (1, 2.8 mg, tR28.6 min).
Fraction B was then subjected to semipreparative HPLC on an RP-C18 column using MeOH-H2O (70:30) to afford six fractions (G-L).
Fraction I afforded cordylane D (4, 1.4 mg, tR 25.5 min), and fraction K afforded cordylane C (3, 2.0 mg, tR 28.6 min). Fraction VII was separated using semipreparative RP-C18 HPLC using MeOH-H2O (75:25). Five
fractions (M-Q) were collected. Fraction P afforded cordylane B (2, 2.0 mg, tR 27.3 min). Fraction VIII was also separated using semipreparative phenyl HPLC using MeOH-H2O (70:30) to obtain five fractions (R-V),
of which fraction T afforded cordylane A (1, 4.6 mg, tR 24.9 min).
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