*2.1. Chemicals*

The chemicals used in the study ERL and QUR were procured from Weihua Pharma Co., Limited (Hangzhou, Zhejiang, China) and fatty acid-free BSA from Sigma-Aldrich (St. Louis, MO, USA). The phosphate buffer saline (PBS) pH-7 was prepared afresh to prepare the stock solution. QUR and ERL were dissolved in DMSO (dimethyl sulfoxide) followed by dilution with PBS. Millipore water (type-I) was used to prepare the stock solutions.
