Ethylenediaminetetraacetic acid disodium salt dihydrate

NBT (98%) and allopurinol (98%) were purchased from Aladdin Industrial Corp. (Shanghai, China). XOD and xanthine (≥99%) were purchased from Sigma-Aldrich Chemical Corp. (St. Louis, MO, USA). Ethylenediaminetetraacetic acid disodium salt dihydrate (EDTA-2Na·2H₂O, ≥ 99.0%), dipotassium hydrogen phosphate trihydrate (K₂HPO₄·3H₂O, ≥ 99.0%), potassium dihydrogen phosphate (KH₂PO₄, ≥99.5%), and dextran (Mw 20,000) were purchased from Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China). Glycerol (99%) was purchased from Shanghai Macklin Biochemical Co., Ltd. (Shanghai, China). Bovine serum albumin (BSA) was purchased from Absin Bioscience Inc. (Shanghai, China). Trehalose (≥99%) was purchased from Sinozyme Biotechnology Co., Ltd. (Nanning, China). Ultrahigh-purity water was produced using a Milli-Q water purification system from Millipore (Milford, MA, USA). The 3D printing materials, namely, polycaprolactone, wax wire, and polylactic acid (PLA) filament, were purchased from Dongguan Top Cool Electronics Technology Co., Ltd. (Dongguan, China), Fuzhou Zhilei Electronic Technology Co., Ltd. (Fuzhou, China), and Hangzhou Shining 3D Technology Co., Ltd. (Hangzhou, China), respectively. Salvia miltiorrhiza (batch No. 170901) was purchased from Jiuzhou Drugstore (China Jo-Jo Drugstores Inc., Hangzhou, China).