A new naphthoquinone from Ceiba pentandra.
A new naphthoquinone, 2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone (1) together with a known naphthoquinone, 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (2), has been isolated from the heartwood of Ceiba pentandra. The structures of 1 and 2 have been elucidated by extensive 1D and 2D NMR experiments.
Kishore
P Hari
PH
Natural Products Division, Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
Reddy
M Vijaya Bhaskar
MV
Gunasekar
D
D
Caux
Cristelle
C
Bodo
Bernard
B
D035164:Ceiba / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009285:Naphthoquinones / Q000737:chemistry / Q000302:isolation & purification*
C479096:2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone; C479097:8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone; D009285:Naphthoquinones