 showed correlations with the carbon signals at C-0a (*δ~C~* 000.0), C-0 (*δ~C~* 000.0), C-0a (*δ~C~* 000.0) and OCH~0~-0 (*δ~C~* 00.0). Furthermore, in the NOESY spectrum, the cross peaks observed between furan proton H-0 (*δ~H~* 0.00) and OCH~0~-0 (*δ~H~* 0.00), and between the OCH~0~-0 (*δ~H~* 0.00) and proton H-0 (*δ~H~* 0.00), clearly indicated that the furan ring is fused to the quinoline nucleus at the position \[0,0-*b*\]. Th