*4.5. Preparation of SA Analog Solutions*

SA and AcSA were dissolved in sterile, de-ionized water, then diluted to the necessary concentrations. All other SA analogs were diluted in 100 μL of 100% ethanol or DMSO, then diluted to their respective concentrations with sterile, de-ionized water as needed. All solutions were filter–sterilized using a 0.2 μm syringe filter prior to use.

**Author Contributions:** Conceptualization, I.A.P., F.L., and Z.Q.F.; Investigation, I.A.P., H.C., J.C., M.C., M.L.; Resources, Z.Q.F.; Writing—Original Draft, I.A.P.; Writing—Review and Editing, I.A.P., M.L., F.L., and Z.Q.F.; Supervision, Z.Q.F.; Funding Acquisition, Z.Q.F.

**Funding:** This research was funded by the National Science Foundation (Early-Concept Grants for Exploratory Research (EAGER) grant 1464527 and grant number IOS-1758994 to Z.Q.F.) and an ASPIRE I grant from the University of South Carolina to Z.Q.F.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
