TY  - JOUR
AU  - Wang, Hao
AU  - Umeokoli, Blessing O.
AU  - Eze, Peter
AU  - Heering, Christian
AU  - Janiak, Christoph
AU  - Müller, Werner E. G.
AU  - Orfali, Raha S.
AU  - Hartmann, Rudolf
AU  - Dai, Haofu
AU  - Lin, Wenhan
AU  - Liu, Zhen
AU  - Proksch, Peter
TI  - Secondary Metabolites of the Lichen-Associated Fungus Apiospora montagnei
JO  - Tetrahedron letters
VL  - 58
IS  - 17
SN  - 0040-4039
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-05554
SP  - 1702–1705
PY  - 2017
AB  - The endolichenic fungus Apiospora montagnei isolated from the lichen Cladonia sp. was cultured on solid rice medium, yielding the new diterpenoid libertellenone L (1), the new pyridine alkaloid, 23-O-acetyl-N-hydroxyapiosporamide (2) and the new xanthone derivative 8-hydroxy-3-hydroxymethyl-9-oxo-9H-xanthene-1-carboxylic acid methyl ether (3) together with 19 known compounds (4–22). The structures of the new compounds were elucidated by 1D and 2D NMR spectra as well as by HRESIMS data. The absolute configuration of the new 6,7-seco-libertellenone derivative 1 was determined by single-crystal X-ray diffraction. Four additional known compounds 23–26 were isolated when NaCl or NH4Cl were added to solid rice medium. Compounds 7–9, 18 and 26 exhibited significant cytotoxicity against the L5178 murine lymphoma cell line with IC50 values of 2.6, 0.2, 2.1, 2.7 and 1.7 μM, respectively.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000399862100009
DO  - DOI:10.1016/j.tetlet.2017.03.052
UR  - https://juser.fz-juelich.de/record/836433
ER  -