the compound i 5 is represented by the following formula i 5 the compound i 6 was isolated as colorless powders and the analysis data thereof are listed as follow mp 100 101 u00b0 c u03b1 d 25 174 c 0 008 meoh uv meoh u03bb max log u03b5 251 4 05 nm ir kbr u03bd max 3386 2967 2877 1732 1711 1669 1235 1197 1167 1083 cm u2212 1 1 h nmr and 13 c nmr see the following tables 1 and 3 esims m z 507 m na hresims m z 507 3083 calculated for c30h44o5na 507 3086 these data helped to establish the structure of the compound i 6 and the result showed that the structure of the compound i 6 is represented by the following formula i 6 the compound i 7 was isolated as colorless powders and the analysis data thereof are listed as follow mp 196 198 u00b0 c u03b1 d 25 139 c 0 007 meoh uv meoh u03bb max log u03b5 247 4 33 nm ir kbr u03bd max 3420 2964 2930 2875 1707 1659 1171 cm u2212 1 1 h nmr and 13 c nmr see the following tables 1 and 3 esims m z 493 m na hresims m z 493 2929 calculated for c 29 h 42 o 5 na 493 2930 these data helped to establish the structure of the compound i 7 and the result showed that the structure of the compound i 7 is represented by the following formula i 7 the compound i 8 was isolated as colorless syrup and the.