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5 protocols using acetonitrile ch3cn

1

Bergamottin Inhibition of Midazolam Metabolism

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Bergamottin was purchased from ChromaDex (Irvine, CA; purity ≥ 96.9%) and Sigma-Aldrich (St. Louis, MO; purity ≥ 98.0); DHB was purchased from Cayman Chemical (Ann Arbor, MI; purity ≥ 98.0%) and Sigma-Aldrich (purity ≥ 97.2%). Midazolam (purity ≥ 99.9%), 1′-hydroxyMidazolam (purity ≥ 98.0%), ketoconazole (purity ≥ 98.0%), alprazolam (purity ≥ 99.0%), and NADPH were purchased from Sigma-Aldrich. Purity of standards is reported as determined by HPLC (TLC in the case of alprazolam) by the manufacturers. A not-from-concentrate grapefruit juice (Simply Grapefruit, Simply Orange Juice Co., Apopka FL; lot AMC3 E 01:13) was purchased from a local grocery store. Methanol (MeOH) was purchased from Pharmco-Aaper (Shelbyville, KY) and Fischer Scientific (Waltham, MA). UPLC-grade water (H2O) and acetonitrile (CH3CN) were purchased from Fisher Scientific. Pooled human intestinal microsomes (HIM) (n = 18 donors) were purchased from Xenotech (Lenexa, KS).
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2

Comprehensive Microcystin Analytical Protocol

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MC-LR, MC-RR, and MC-LA were purchased from Cayman Chemical (Ann Arbor, MI, USA). MC-YR, MC-LF, and MC-LW were purchased from Enzo Life Sciences (Farmingdale, NY, USA). C2D5 MC-LR was purchased from Cambridge Isotope Laboratories (Tewksbury, MA, USA). MC-LR-Cys was synthesized by the Westrick group (Wayne State University, Detroit, MI, USA) [46 (link)]. ACS-grade zinc sulfate (ZnSO4) and HPLC-grade water, methanol (CH3OH), and acetonitrile (CH3CN) were purchased from Fisher Scientific (Pittsburgh, PA, USA). Reagent-grade formic acid (FA) was purchased from Sigma (St. Louis, MO, USA).
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3

Transition Metal Electrochemistry Reagents

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Materials. All solvents and reagents were laboratory reagent grade or better and used as received. Potassium hydroxide (KOH, Sigma-Aldrich, ≥ 85%), tetra-n-butylammonium hydroxide [Bu 4 N]OH (1.0 M in methanol, Alfa Aesar), manganese(II) acetate tetrahydrate (Mn(O 2 CCH 3 ) 2 •4H 2 O, Merck), lithium perchlorate anhydrous (LiClO 4 , ≥ 98%, Sigma-Aldrich), calcium trifluoromethanesulfonate anhydrous (Ca(CF 3 SO 3 ) 2 , Aldrich, 99.9%), strontium nitrate anhydrous (Sr(NO 3 ) 2 , 99+%, Strem) were used as received. Acetonitrile (CH 3 CN, Fisher, HPLC grade), and tetra-n-butyl-ammonium perchlorate ([Bu 4 N]ClO 4 , Fluka) for electrochemical measurements were stored under an argon atmosphere in a dry-glove box.
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4

Simultaneous HPLC Analysis of Quercetin and Hydrochlorothiazide

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Quercetin
(QT) and methanol (HPLC grade) were purchased from Sigma-Aldrich Chemicals,
USA. Hydrochlorothiazide (HCZ) was procured from Clarsynth Labs, Mumbai,
India. Capmul MCM NF (CAP MCM NF) and Cremophor RH40 (CR RH40) were
obtained from Gattefosse (Saint-Priest, Cedex, France) and BASF (Ludwigshafen,
Germany), respectively. Acetonitrile (CH3CN) and ammonium
formate (NH4HCO2) were procured from Thermo
Fisher Scientific, India. HPLC grade water was obtained from Rankem,
India. All other chemicals and reagents were of analytical grade.
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5

Characterization of Chemical Standards

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Formic acid (HCOOH), methanol (CH 3 OH) and acetonitrile (CH 3 CN) were purchased from Thermo Fisher Scientific. Water was obtained using an 18 Ωm Milli-Q system (EMD Millipore Corporation). All chemicals and solvents were of Optima LCMS grade. The following standards were obtained from Sigma-Aldrich: doxycycline, tetracycline, roxithromycin, erythromycin, puromycin, novobiocin, amphotericin B, cycloheximide, mitomycin C, vancomycin, ursolic acid, betulinic acid, and oleanolic acid. Chloramphenicol and nystatin were acquired from Calbiochem. Florfenicol and cyclosporin A were purchased from Santa Cruz Biotechnology. Azithromycin was purchased from TCI. Thiamphenicol was acquired from Spectrum Chemicals. Actinomycin D was purchased from RPI. All standards were assessed by NMR (Supporting Information Figures S2-S21) and, where required, purified by HPLC (Agilent 1200, Phenomenex Synergi C18 4.6 x 250 mm, 2 mL/min, H 2 O + 0.02% HCOOH and CH 3 CN).
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