Structural characterization of tetranortriterpenes from Pseudrocedrela kotschyi and Trichilia emetica and study of their activity towards the chaperone Hsp90 - Dal Piaz, F; Malafronte, N; Romano, A; Gallotta, D; Belisario, M A; Bifulco, G; Gualtieri, M J; Sanogo, R; De Tommasi, N; Pisano, C (Phytochemistry, 2012)