Screening Antitumor Compounds Psoralen and Isopsoralen from Psoralea corylifolia L. Seeds

Table 1

Putative identification of main components of Psoralea corylifolia L. fraction IV.

Peak No.^a	Mass data	UV (nm)	Identification
1	187 [M + H]^+	212.0, 240.0, 296.0, 326.0	Psoralen^b
2	187 [M + H]^+	204.0, 244.0, 300.0	Isopsoralen^b
3	323 [M + H]^+, 267 [M–C4H7]^+, 239 [M–C4H7–CO]^+	208.0, 248.0	Neobavaisoflavone
4	321 [M + H]^+	248.0, 300.0	Corylin

^aPeaks No. refers to Figure 3;
^bIdentification throguh comparison the retention time with that of standard substance.