Table 3.

¹³C NMR data of isolated compound (300 MHz, acetone-d₆).

C number	Literature data	Isolated compound data
1	141.3	140.9
2	105.8	105.7
3	159.7	159.6
4	102.7	102.7
5	159.7	159.6
6	105.8	105.7
7	129.4	129.1
8	127.0	126.9
1′	130.4	130.0
2′	128.8	128.7
3′	116.5	116.4
4′	158.4	158.2
5′	116.5	116.4
6′	128.8	128.7