Table 2.

¹³C NMR data of propolins A, B, C, D, E and F

Carbon No.	Propolin A δC	Propolin D δC	Propolin B δC	Propolin F δC	Propolin C δC	Propolin E δC
2	77.8	77.8	80.7	80.7	79.9	80.6
3	43.7	43.7	44.1	44.0	43.6	44.2
4	198.2	198.2	197.7	197.8	197.3	197.8
5	165.2	165.1	164.8	164.8	162.2	164.8
6	97.1	97.1	97.0	97.1	109.0	97.0
7	168.3	168.4	168.5	168.5	165.0	168.4
8	96.2	96.2	96.2	96.3	95.3	96.2
9	165.5	165.5	165.4	165.4	161.9	165.2
10	103.2	103.2	103.4	103.3	103.0	103.4
1′	129.7	129.7	130.9	130.8	131.6	130.9
2′	128.3	128.3	111.9	112.0	114.6	128.9
3′	144.5	144.4	146.1	146.1	145.1	129.5
4′	146.5	146.5	144.6	144.6	146.4	156.7
5′	113.6	113.6	129.7	129.7	115.9	119.5
6′	118.7	118.7	119.8	119.7	119.1	126.3
1″	25.4	25.4	29.2	29.1	21.5	29.1
2″	124.7	124.6	123.9	123.8	123.5	123.7
3″	135.8	135.7	137.0	136.9	134.9	137.2
4″	16.2	16.4	16.1	16.2	16.2	16.1
5″	41.2	40.7	41.3	40.8	40.5	41.2
6″	23.7	27.7	23.7	27.6	27.4	23.7
7″	44.3	125.3	44.3	125.3	125.1	44.3
8″	71.5	132.3	71.4	132.3	131.6	71.5
9″	29.1	17.7	29.1	17.8	17.7	29.2
10″	29.2	25.8	29.2	25.8	25.8	29.1

Assignments were based on the HMQC and HMBC NMR data.