Composition and Antioxidant Activity of Geopropolis Collected by Melipona subnitida (Jandaíra) Bees

Table 1

¹H and ¹³C NMR (300/75 MHz, DMSO-𝑑₆) of compound (1).

Position	𝛿𝐶	𝛿𝐻	HMBC correlations
9	166.68	—	H-8, H-7
4	159.89	—	H-3,5; H-2,6
7	144.95	—	H-2,6
7	144.82	7.7 (𝑑, 𝐽=15.3)	—
2,6	130.40	7.5 (𝑑, 𝐽=8.7)	H-7
1	125.05	—	H-3,5; H-8
3,5	115.78	6.7 (𝑑, 𝐽=8.7)	—
8	113.97	6.4 (𝑑, 𝐽=15.9)	—
1′𝛼	92.32	4.91 (𝑑, 𝐽=3.3)	2𝛼, 5𝛼
1′𝛽	96.93	4.32 (𝑑, 𝐽=7.8)	2𝛽
5′𝛽	76.44	3.2 (𝑚)	4𝛽, H-3𝛽
3′𝛽	74.72	2.9 (𝑡, 𝐽=8.4)	4𝛽, 1𝛽, 5𝛽
2′𝛽	73.60	3.4 (m)	—
5′𝛼	72.91	3.6 (m)	H-1′𝛼
4′𝛽	72.19	3.1 (m)	—
4′𝛼	70.66	3.2 (m)	—
3α	70.24	3.1 (𝑡, 𝐽=8.4)	—
2′α	69.28	3.8 (m)	—
6′a	63.97	4.4 (𝑑𝑑, 12.0, 1.5)	—
6′b	63.97	4.1 (𝑑, 𝐽=11.1, 6.6)	4β