*5.8. Statistical Analysis*

Statistical analysis of data was carried out using IBM SPSS Statistic version 23.0 (SPSS, Chicago, Il, USA) statistical software package. Data are expressed as mean ± SD of three independent experiments. The statistical analysis of the results was performed by student's T-test for paired samples. Di fference between groups were analyzed statistically with ANOVA followed by the Tukey HDS post-hoc test for multiple comparisons. The level of *p* ≤ 0.05 was considered statistically significant.

**Supplementary Materials:** The following are available online at http://www.mdpi.com/2072-6651/12/4/212/s1, Figure S1. Percentage of α-ZEL, β-ZEL, and BEA remaining in the medium of SH-SY5Y cells after treatment during 24, 48, and 72 h at di fferent concentrations and combinations by LC–ESI–qTOF-MS. ( **A**) β-ZEL+ BEA and (**B**) α-ZEL + β-ZEL.

**Author Contributions:** Data curation, F.A.; Formal analysis, C.J. and A.J.-G.; Funding acquisition, G.F., C.J., and A.J.-G.; Investigation, F.A., C.J., and A.J.-G.; Methodology, A.J.-G.; Supervision, C.J. and A.J.-G.; Writing—original draft, F.A, C.J. and A.J.-G.; Writing—review & editing, C.J. and A.J.-G. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was supported by the Spanish Ministry of Economy and Competitiveness AGL2016-77610-R and the Generalitat Valencian GVPROMETEO2018-126.

**Conflicts of Interest:** The authors declare no conflict of interest.
