Stigmasterol, (S)-stylopine, isobrucine, icaride A, and isostrychnine N-oxide (I), which may act on key targets such as ADRB1, ADRB2, CHRM3, ADRA1A, and ESR1, are the main ingredients of semen strychni used to treat gliomas. Here, ESR1 is linked to central nervous system cancer.