4147 Ptaquiloside Ptaquiloside is the major toxin of bracken, and was first isolated in 1983. It is an unstable glucoside containing a reactive cyclopropane ring. (A3228). 87625-62-5 53297436 C20H30O8 White powder. 3, not classifiable as to its carcinogenicity to humans. (L135) Ptaquiloside is the major toxin of bracken, and was first isolated in 1983. 2014-08-29T05:07:16Z 2026-05-20T18:27:45Z C19515 true [H][C@@]1(C)C[C@@]2(O[C@]3([H])O[C@]([H])(CO)[C@@]([H])(O)[C@]([H])(O)[C@@]3([H])O)C=C(C)C3(CC3)[C@@](C)(O)C2([H])C1=O C20H30O8 InChI=1S/C20H30O8/c1-9-6-20(28-17-15(25)14(24)13(23)11(8-21)27-17)7-10(2)19(4-5-19)18(3,26)16(20)12(9)22/h7,9,11,13-17,21,23-26H,4-6,8H2,1-3H3/t9-,11-,13-,14+,15-,16?,17+,18+,20-/m1/s1 GPHSJPVUEZFIDE-VGFVQWJBSA-N 398.4474 398.194067936 Exogenous Solid 30790996 CHEM003053 DTXSID20892005 NS00066985 136.68 97.15099999999998 40.10934833510403 3 8 5 12.202545137343606 -2.981083856141958 0 4 -0.59 -1.74 7.30e+00 g/l