). Greenishyellow powder. Yield 89.46%; m.p. 18 4-186°C. UV (MeOH) λmax: 244 nm (I) and 261 nm (II). 1 HNMR (DMSO, 500 MHz) δ 6.74 (s, 1H, H-4), δ 6.80 (s, 1H, H-5), δ 3.15 (t, 1H, H-8a), δ 3.98 (d, 1H, J = 6.5 Hz, H-9), δ 3.96 (d, 2H, H-11), δ 5.11 (m, 1H, H-12) , δ 1.62 (s, 3H, , H-14), δ 1.83 (s, 3H, H-15), δ 4.08 (d, 2H, J = 6.5 Hz, H-16), δ 5.13 (m, 1H, H-17), δ 1.69 (s, 3H, H-19), δ 1.58 (s, 3H, H-20), δ 3.65 (s, 3H, OCH3). 13
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Isolation and Characterization of Bioactive Compound
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Corresponding Organization : Padjadjaran University
Other organizations : Universitas Kejuangan 45 Jakarta, Theranostics (New Zealand), National Nuclear Energy Agency of Indonesia
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Variable analysis
independent variables
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- Melting point (m.p.)
- UV absorption (λmax)
- 1H NMR chemical shifts
- Solvent (MeOH) for UV absorption
- No positive or negative controls were explicitly mentioned.
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