164 in acidic methanol ______________________________________ proton nmr spectrum u03b4 h 1 12 3h t j 7 3 hz h 14 1 36 3h d j 6 2 hz h 6 39 1 20 1 95 6h h 13 h 2 39 h 3 34 h 5 34 2 15 1h dd j 3 5 14 8 hz h 8a 2 24 1h d j 14 8 hz h 8b 2 8 3 2 6h h 3 39 h 4 34 h 2 34 a h 6 34 a 3 56 1h brs h 4 39 3 80 4 32 6h h 2 34 b h 6 34 b h 5 39 4 85 1h s h 10 5 12 1h brs h 7 5 45 1h brs h 1 39 7 30 1h d j 8 0 hz h 3 7 74 1h dd j 8 0 8 0 hz h 2 7 82 1h d j 8 0 hz h 1 molecular formula c 31 h 38 o 9 n 2 hcl specific rotation u03b1 d 22 305 2 u00b0 c 0 1 in 0 01 n hcl meoh ______________________________________uv visible spectrum e sub 1 cm sup 1 ______________________________________235 594 240 623 255 463 298 121 294 137 555 215 492 250 in alkaline methanol 527 170 in acidic methanol ______________________________________ proton nmr spectrum u03b4 h in deuterochloroformdeuteromethanol 1 10 3h t j 7 3 hz h.