8-O-(4-aminocinnamoyl)-8-O-debutanoylthapsigargin
8-O-(12-[Nα-tert-butoxycarbonyl-L-phenylalaninoylamino]dodecanoyl)-8-O-debutanoylthapsigargin
thiapsigargin
8-O-(3-[4-{Nα-tert-butoxycarbonyl-L-leucinoylamino}phenyl]propanoyl)-8-O-debutanoylthapsigargin
8-O-(6-tert-butoxycarbonylaminohexanoyl)-8-O-debutanoylthapsigargin