346.1048 ([Ml+; talc. for CL8H1s0,: 346.1052) (20), 107 (100). Napoli. Compound 2 (20mg) was isolated by TLC [C6Hs-EtOAc (23: 2), 3 runs] of the crystals obtained by crystallization (CHCIJ) of fraction b. It had mp 136-138” (from CHCl,), [a],, -51” (MeOH, c 0.7). UV lEH nm ...