Table 1 1 H in Withanolides from three species of the genus Deprea (Solanaceae). Chemotaxonomical considerations

Table 1 1 H NMR spectroscopic data of compounds 1–3 in CDCl. a 3
Position12318 R and 18 S18 R and 18 S18 R2a5.91 dd (9.6, 2.6)3.32 br d (20.4)5.88 dd (9.9, 1.7)2b–2.79 dd (20.4, 4.6)–36.81 ddd (9.6, 4.8, 2.6) R /5.81 m6.76 ddd (9.9, 5.0, 2.5)6.80 ddd (9.6, 4.7, 2.6) S––4 a2.90 dd (21.6, 4.8)6.10 br d (9.7)2.85 dd (21.0, 5.0)4 b3.35 br d (21.6)–3.29 br d (21.0)65.84 m R /5.83 m S5.82 m5.62 br d (5.2)7a3.95 m4.05 m2.27 m7b––1.78 m81.51 m R /1.92 m S1.62 m R /2.01 m S1.90 m92.02 m R /2.05 m S2.11 m R /2.14 m S1.90 m11a––2.07 m11b––1.48 m12a2.58 br d (12.4) R /2.04 m S2.55 m R /1.99 m S2.15 m12b1.64 m R /1.54 m S1.61 m R /1.53 m S2.00 m141.74 m R /1.84 m S1.76 m R /1.86 m S–15a––1.93 m15b––1.71 m16a1.89 m R /1.93 m S1.92 m S1.87 m16b1.76 m R /1.82 m S1.85 m S–172.12 m2.11 m R /2.08 m S2.08 m185.18 br s R /5.31 br s S5.21 s R /5.31 s S5.11 d (7.8)191.21 s R /1.23 s S1.32 s R /1.34 s S1.25 s211.51 s R /1.31 s S1.50 s R /1.31 s S1.28 s224.46 dd (13.2, 3.3) R /4.45 dd (13.2, 3.2) R /4.35 m4.54 dd (13.2, 3.3) S4.57 dd (13.2, 3.0) S–23a2.42 m R /2.52 m S2.40 m R /2.48 m S3.04 dd (18.1, 13.1)23b2.05 m R /2.18 m S2.04 m R /2.17 m S2.24 m27a1.88 s1.87 s4.40 m27b––4.33 m281.95 s1.95 s2.07 sOH-18––4.45 m
a Chemicals shifts (δ) downfield from TMS, J couplings (in parentheses) in Hz. 400.13 MHz.