Amides from Piper as a Diuretic: Behind the Ethnopharmacological Uses of Piper glabratum Kunth

Table 1

¹³C NMR (100 MHz, CDCl₃), ¹H NMR (300 MHz, CDCl₃), ¹H, ¹³C–HMQC, and 1H, ¹³C–HMBC data of P-1 compound.

C	δ C	𝛿H	^1𝐽	HMQC	HMBC	P-1 compound (MMCP)
1	117.09
2	154.65
3	94.86	6.49 (𝑠, 1H)	16.08	6.49/94.86	6.49/154.65; 149.71; 141.51
4	141.51
5	149.71
6	106.67	6.96 (𝑠, 1H)	16.25	6.96/106.67	6.96/154.65; 141.51; 149.71; 136.54
7	136.54	7.90 (𝑑, 1H)	16.0	7.90/136.54	7.90/165.41
8	117.06	6.57 (𝑑, 1H)	16.0	6.57/117.06	6.57/165.41
9	165.41
2′	46.50	3.57 (𝑚, 2H)	32.20	3.57/46.50	3.57/26.15
3′	26.15	1.96 (𝑚, 2H)	15.33	1.96/26.15
4′	24.37	1.85 (𝑚, 2H)	16.59	1.85/24.37
5′	45.93	3.55 (𝑚, 2H)	32.20	3.55/45.93	3.55/24.37
OMe–2	56.57	3.78 (𝑠, 3H)	22.76	3.78/56.57	3.78/154.65
OMe–4, 5	101.57	5.91 (𝑠, 2H)	35.98	5.91/101.57	5.91/149.71; 141.51

Chemical shifts 𝛿 in ppm relative to TMS, 𝐽 in Hz.