“…[119,120] Total syntheses of 173 have been completed, notably by the groups of Hale, [121] Boeckman, [122] and Tadano. [123] Given that 172 is close in structure to atripliciolide tiglate (174), which was reported by Bohlmann et al (Figure 31), [124] and to many other family members in this series, [125] Le Quesne and Raffauf suggested that a close relationship must exist between the genera Eremanthus, Lychnophora, Piptolepis, and Vanillosmopsis in the family Vemoniae. [119] 4.6.…”