Table 1. Comparison of NMR Spectroscopic Data for Natural and Synthetic Juglomycin Z (7), Bhimamycin E (30), and 2-Methyl-3-acetoxy-5-methoxy-1,4-naphthoquinone (31).

	natural 7b		synthetic 7c			30d		31e
positiona	δC	δH	δC	δH	positiona	δC	δH	δC	δH
1′	182.2		184.8		1	183.1		185.0
2′ or 3′	148.4		145.9		2	153.7		133.5
3′ or 2′	149.6		144.2		3	119.9		151.9
3′-Me	18.5	2.67	12.7	2.26	COMe	30.1	2.34	20.4	2.06
4′	186.6		190.6		4	184.3		176.6

^aCarbon atoms have been labeled using the IUPAC numbering system.

^b1H NMR (200 MHz, CDCl₃/CD₃OD) and ¹³C NMR (50.3 MHz, CDCl₃).⁸

^c1H NMR (400 MHz, CDCl₃/CD₃OD = 9/1, TMS) and ¹³C NMR (100 MHz, CDCl₃).

^d1H NMR (300 MHz, CDCl₃) and ¹³C NMR (75.5 MHz, CDCl₃).²⁷

^e1H NMR (500 MHz, CDCl₃) and ¹³C NMR (125 MHz, CDCl₃, TMS).²⁸