Antioxidant Activity In Vitro Guided Screening and Identification of Flavonoids Antioxidants in the Extract from Tetrastigma hemsleyanum Diels et Gilg

Table 1

Molecular weight and formula of six chemical components in EAE (4 mg/mL).

No.	tR/min	Molecular formula	Measured value (m/z)	Theoretical value (m/z)	Relative error (ppm)
1	14.393	C27H30O16	610.1494	610.1473	2.31
2	14.682	C21H19O12	464.0955	464.0944	2.24
3	15.181	C27H29O15	594.1585	594.1576	1.41
4	15.422	C21H19O11	448.1006	448.0996	2.19
5	17.160	C15H9O7	302.0427	302.0421	1.82
6	18.077	C15H9O6	286.0477	286.0477	0.09