Table 1 1 H in Chemical constituents derived from Artocarpus xanthocarpus as inhibitors of melanin biosynthesis

Table 1 1 H (400 MHz) and 13 C NMR (100 MHz) spectroscopic data of compounds 1, 2, and 6.
Position1 (acetone- d 6)2 (acetone- d 6)6 (acetone- d 6)δ C, mult.δ H (J in Hz)δ C, mult.δ H (J in Hz)δ C, mult.δ H (J in Hz)1157.2, C157.0, C2160.7, C106.4, C107.8, CH6.18, d (2.4)3118.0, C160.5, C156.9, C4182.4, C110.0, C102.1, CH6.15, d (2.4)4a104.7, C155.3, C147.0, C4b35.1, CH a3.45, br s5157.1, C126.7, C40.0, CH b3.57, br s b6104.7, C159.5, C43.8, CH22.21, br s 2.42, dd (15.6, 3.2)6a142.2, C7162.9, C143.4, C107.2, CH5.92, d (2.4)894.2, CH6.57, s133.2, CH8.22, s156.8, C8a159.2, C122.6, C925.7, CH22.59, dd (16.4, 9.6) 3.51, dd (16.4, 2.0)181.2, C107.1, CH6.07, d (2.4)9a105.0, C1092.3, CH4.02, dd (9.6, 2.0)157.0, C10a152.2, C117.8, C10b39.9, CH b3.57, br s b1173.1, C116.4, CH6.68, d (10.0)48.2, CH4.40, br s1225.8, Me1.34, s129.7, CH5.79, d (10.0)40.3, CH4.93, br s12a118.2, C1327.9, Me1.36, s80.1, C126.4, C1422.7, CH23.36, d (7.2)29.3, Me1.52, s156.0, C15124.0, CH5.28, br t (7.2)29.2, Me1.51, s104.4, CH6.43, d (2.4)16132.3, C22.6, CH23.61, d (7.2)157.6, C1726.5, Me1.65, s123.9, CH5.39, br t (7.2)108.6, CH6.21, dd (8.4, 2.4)1818.6, Me1.78, s132.7, C128.3, CH6.64, d (8.4)1926.6, Me1.65, s149.6, C2018.9, Me1.87, s108.9, CH6.09, d (2.0)21198.3, C159.1, C2254.0, CH23.28, 2.83, d (18.4)101.5, CH6.12, br t (2.0)2378.3, C159.1, C24139.6, C108.9, CH6.09, d (2.0)2525.9, Me2.18, s127.4, C26118.6, CH25.04, 5.25, s157.3, C27174.8, C103.7, CH6.35, d (2.4)28157.5, C29107.1, CH6.09, dd (2.4, 8.4)30130.4, CH6.33, d (8.4)1 0115.7, C2 0161.6, C3 0109.3, CH6.67, d (2.4)4 0163.1, C5 0112.5, CH6.72, dd (8.8, 2.4)6 0131.7, CH7.92, d (8.8)OMe-2754.0, Me3.73, sOH-112.95, br sOH-513.35, br sOH-235.52, br s
The attached proton number of each carbon signal was verified by DEPT pulse sequence and confirmed by HMQC and HMBC 2D NMR spectra. a This signal was not identified in the HMQC spectrum; b These signals were overlapped in each column.