Rapid Identification and Simultaneous Quantification of Aristolochic Acids by HPLC-DAD and Confirmations by MS in Aristolochia chilensis Using a Limited Biomass

Table 4

Mass of the AAs and confirmatory fragments in Aristolochia chilensis extracts.

Peak number	AAs	Molecular weight	m/z ESI (+)
1	AAIVa	357	358.05 [M+H]^+
			312.06 [M+H-H2O-OCH3]^+
			314.06 [M+H-H2O-CO]^+
			340.04 [M+H-H2O]^+
2	AAIa	327	328.23 [M+H]^+
			284.06 [M+H-CO2]^+
			310.04 [M+H-H2O]^+
3	AAIII	341	342.13 [M+H]^+
			282.27 [M+H-CO2-CH3]^+
4	AAII	311	312.36 [M+H]^+
			284.33 [M+H-CO]^+
			294.04 [M+H-H2O]^+
5	AAI	341	342.06 [M+H]^+
			296.07 [M+H-H2O-OCH3]^+
			298.07 [M+H-H2O-CO]^+
			324.05 [M+H-H2O]^+
6	AAIV	371	372.12 [M+H]^+
			328.06 [M+H-H2O-CO]^+
			354.06 [M+H-H2O]^+