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Figure 7. Linearity of response for 12-deoxywithastramonolide over the full concentration range by (A) linear regression and (B) residual analysis and over a truncated concentration range by (C) linear regression and (D) residual analysis.

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Figure 8. Linearity of response for withanolide A over the full concentration range by (A) linear regression and (B) residual analysis and over a truncated concentration range by (C) linear regression and (D) residual analysis.