. 2015 Aug 25;10(8):e0136228. doi: 10.1371/journal.pone.0136228

Table 4. Chemical shift summarized from ¹H (DMSO-d₆) and ¹³C (MeOD-d₆) analyses recorded by 600 MHz NMR spectrometry.

¹H NMR	Chemical shift δ (ppm)	¹³C NMR	Chemical shift δ (ppm)
-COOCH ₃	3.95, s	C-1	120.9
C-2	8.41, d	C-2	134.4
C-3	7.30, d	C-3	111.2
C-7	8.28, d	C-4	156.5
C-8	7.39, d	C-4a	141.3
-CHO	11.40,s	C-5a	135.2
		C-6	123.0
		C-7	134.5
		C-8	110.1
		C-9	160.2
		C-9a	133.4
		C-10a	139.8
		-CHO	190.7
		-COOCH ₃	52.1
		-COOCH₃	166.2

Table 4. Chemical shift summarized from 1H (DMSO-d6) and 13C (MeOD-d6) analyses recorded by 600 MHz NMR spectrometry.