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Table 2 Quantification of four bioactive components in methanol extract of GD

From: Gynura divaricata rich in 3, 5−/4, 5-dicaffeoylquinic acid and chlorogenic acid reduces islet cell apoptosis and improves pancreatic function in type 2 diabetic mice

Bioactive components Linear regression equations Correlation coefficients (R2) Contents (mg/g GD powder)
Chlorogenic acid y = 381,854.86597 + 57,440,112.13043× 0.99884 5.57 ± 0.35
3, 4-dicaffeoylquinic acid y = −27,745.44883 + 68,618,107.60542× 0.99988 0.67 ± 0.08
3, 5-dicaffeoylquinic acid y = 250,500.51458 + 78,350,260.14366× 0.99905 10.29 ± 0.74
4, 5-dicaffeoylquinic acid y = 26,676.51400 + 9,837,283.14720× 0.99975 6.84 ± 0.14