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Constitutional formulae of Tg (A), EpoTg (B), and thapsigargin analogs in which the butanoyl group of thapsigargin at O-8 is substituted by 12-aminododecanoyl (8ADT; C) or the 12-amino group of 8ADT is blocked by Boc (Boc-8ADT; D) or terminates in Leu (Leu-8ADT; E) or βAsp (βAsp-8ADT; F).