Table 4.

¹³C NMR data of pyridoacridine alkaloids 20–26.

Position	(125 MHz, DMSO-d6)				(100 MHz, DMSO-d6)		(100 MHz, CDCl3)
	20 [42]	21 [40]	22 [40]	23 [46]	24 [53]	25 [54]	26 [55]
1	117.5	115.8	116.0	117.3	116.3	132.0	131.5
2	135.3	131.1	131.5	134.4	131.8	131.8	130.1
3	123.0	120.4	120.7	122.5	120.8	131.6	128.3
4	125.5	123.4	123.7	127.1	123.5	124.0	123.0
4a	114.1	115.5	115.7	114.6	115.8	122.5	122.1
4b	148.5	139.0	139.3	152.4	139.4	140.5	138.2
5	107.6	107.9	108.2	107.9	108.4	117.2	114.7
6	142.7	150.4	150.6	144.8	150.9	149.1	149.9
7a	131.8	143.1	143.7	nd	143.5	152.0	149.5
7b	132.7	140.1	140.5	135.3	140.7	140.7	142.0
8	–	–	–	–	–	–	–
9	153.8	148.4	148.6	151.0	148.9	162.1	154.6
10a	143.2	139.1	139.3	144.0	140.0	146.3	148.3
11	108.4	104.3	104.5	107.4	106.0	72.5	74.1
11a	132.8	nd	133.3	133.0	133.8	162.7	161.5
11b	118.3	117.4	117.6	118.2	117.9	115.5	114.0
12a	140.5	139.5	139.7	140.3	139.6	146.5	144.9
13	31.0	30.6	30.9	31.0	34.6	47.2	47.4
14	36.2	36.0	36.2	36.8	39.6	41.5	35.2
					–
C=O	167.8	176.9	176.8	169.9	–	174.3	173.6
–	118.1 CH	33.6 CH	41.1 CH	131.0 C	–	39.9 CH	29.4 CH2
–	150.3 C	19.1 CH3	26.5 CH2	130.7 CH	–	26.3 CH3	9.5 CH3
–	26.8 CH3	19.1 CH3	17.1 CH3	13.7 CH3	–	26.3 CH3	–
–	19.5 CH3	–	11.5 CH3	12.4 CH3	–	–	–