Scensidin, a new depsidone from the lichen Buellia canescens(Dicks.) De Not

Cytotoxic Constituents of the Lichen Diploicia canescens

“…yellow powder (CH 2 Cl 2 ); UV (MeOH) λ max (log ε) 231 (4.60), 263 (4.10), 285 (3.94) nm; 1 H NMR (CDCl 3 , 500 MHz) data comparable to published data; 13 C NMR (CDCl 3 , 125 MHz) δ 162.3 (COO, C-7), 161.3 (C, C-2), 158.7 (C, C-4), 152.7 (C, C-2′), 142.9 (C, C-4′, C-5′), 142.1 (C, C-6), 130.3 (C, C-6′), 121.5 (C, C-5), 119.3 (C, C-1′), 114.9 (C, C-1), 101.9 (C, C-3′), 101.3 (CH, C-3), 56.6 (OCH 3 , C-8), 56.5 (OCH 3 , C-8′), 18.5 (CH 3 , C-9), 13.8 (CH 3 , C-7′); EIMS m / z 368 [M] + , 333 [M − Cl] + , 318 [M − CH 3 − Cl] + , 305 [M − CO − Cl] + ; HREIMS m / z 368.0217 [M] + (calcd for C 17 H 14 O 5 Cl 2 368.0218); R f 0.69 (toluene−EtOAc−formic acid, 7:2:0.5).…”

Fulgoicin, a new depsidone from the lichen Fulgensia fulgida(Nyl.)Szat.

“…The organic layer was washed with water, dried, and evaporated to dryness. The residual solid was crystallised from methanol to give the depsidone (2)…”