Additional file 1: Table S1. Sampling schedules during drying process of pretreated SGR. Table S2. The results of precision and reputability tests. Table S3. The results of linear ranges, LODs, LOQs and recovery tests. Table S4. Content of moisture and analytes in SGR during sun-drying. Table S5. Content of moisture and analytes in SGR during shade-drying. Table S6. Content of moisture and analytes in SGR during oven-drying at 45 °C. Table S7. Content of moisture and analytes in SGR during oven-drying at 55 °C. Table S8. Content of moisture and analytes in SGR during oven-drying at 65 °C. Table S9. Content of moisture and analytes in SGR during oven-drying at 75 °C. Table S10. Content of moisture and analytes in SGR during oven-drying at 85 °C. Table S11. Content of moisture and analytes in SGR during oven-drying at 95 °C. Table S12. Content of moisture and analytes in SGR during oven-drying at 105 °C. Table S13. Bioactive ingredient content and DPPH·, ABTS·+, XO and α-Glu(n = 3) inhibitory effects of the 27 dried SGR. Table S14. The operation steps and equations of entropy weight and TOPSIS analysis. Table S15 Comprehensive evaluation result of entropy weight and TOPSIS model. Figure S1. The content rations of trans to cis isomers of SGR throughout drying processing at different sampling times.