Triethylamine tea

All chemicals used in this study were as follows: isosorbide (1,4:3,6-dianhydro-D-sorbitol, 98%), methacrylate anhydride (94%), ethyl 4-N,N-dimethylaminobenzoate (EDMAB), tetrahydrofuran (THF, anhydrous, 99.9%), and magnesium sulfate (MgSO4, 99.5%) were purchased from Sigma-Aldrich. Triethylamine (TEA) and 4,4-dimethylaminopyridine (DMAP) were purchased from Daejung for isosobide dimethacrylate (ISDM). Poly(tetramethylene ether)glycol (PTMG, average Mn 1000 g/mol), isophorone diisocyanate (IPDI, 98%), and diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide (TPO, Shinyoun Rad Chem Ltd.) were also purchased from Aldrich, Korea, for the synthesis of PTMG-based urethane acrylate. ISDM (Fig. 1f) was synthesized as shown in Fig. S4^{33 (link)}.

ACE, N-hippuryl-l-histidyl-l-leucine and hippuric acid were purchased from Sigma-Aldrich Chemical Co. (St. Louis, MO, USA). Standard drugs lisinopril and captopril were obtained from Tokyo Chemical Industries Co., Ltd. (Tokyo, Japan); both were more than 98% pure. Boric acid was purchased from Sigma-Aldrich (Seelze, Germany). Acetonitrile was purchased from Merck, which was HPLC grade 99.9% pure. Deionized water was obtained from MiIIi-Q water assembly (Bedford, USA) and it was used in all the enzymatic reactions. Trifluoracetic acid (TFA) and Triethylamine (TEA) were purchased from Dae-jung Chemicals & Metals Co., Ltd. (Siheung-si, Korea). For the inhibition study, aqueous plant extracts (except for Adhatoda vasica, i.e., the methanolic-aqueous extract) were obtained from the Molecular bank, PCMD, University of Karachi.

Tetraethylorthosilicate (TEOS, 98 wt%, Sigma-Aldrich-Korea, Seoul, Republic of Korea) was used as a silica precursor, H₂O was used as both solvent and hydrolysis agent, Hexadecyltrimethylammonium p-toluenesulfonate (CTATos, 98%, Sigma-Aldrich-Korea, Seoul, Republic of Korea) was used as a template, and Triethylamine (TEA, 99%, DAEJUNG, Siheung-si, Republic of Korea) was used as a catalyst for the synthesis of DMS. For the synthesis of SBA-15, TEOS and H₂O were also used for the same purpose. Poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) (PEG-PPG-PEG; Pluronic P123, Sigma-Aldrich-Korea, Seoul, Republic of Korea) was used as a template, and chloric acid (HCl, 35–37 wt%, Samcheon, Seoul, Republic of Korea) was used as a catalyst. Absolute ethyl alcohol (EtOH, 99.9%, DAEJUNG, Siheung-si, Republic of Korea) was used as a solvent and utilized to remove the surfactant. Tetraethylene pentaamine (TEPA, 93%, Kanto Chemical, Tokyo, Japan) was used as an alkylamine and ethanol was used as both solvent for the impregnation method and solution for washing surfactants from the synthesized DMS and SBA-15. Acetonitrile (ACN, 99.9%, Sigma-Aldrich-Korea, Seoul, Republic of Korea) was used as a mobile phase and elution solvent for the HPLC analysis.