Fig. 1 in Establishing the metabolic network of isoquinoline alkaloids from the Macleaya genus

Fig. 1. Diagram of systematic screening of isoquinoline alkaloids by HPLC-Q-TOF-MS combined with a screening method. (a) X, Y, Z, M, and N represent the number of OCH2O, OCH3, OH, glucose, and H groups, respectively. (b) The number of substituent groups connected to the target skeleton is no more than four.