buds crude extract from of c spectabilis while the 3 o acetyl espectaline was obtained from the dichloromethane subfraction with 4 6 yield the compounds spectaline and 3 o acetyl espctaline had their chemical structures confirmed by polarimetric data melting point and nmr spectrometric data of uni and bi dimensional 1 h and 13 c infrared ir and mass spectrometry ms the espctaline was identified by comparison with laboratory available data as being u2212 espectaline and the 3 o acetyl espectaline was characterized as a natural derivative from espectaline the u2212 3 o acetyl espectaline to a solution of espectaline 0 5 g 1 54 mmol under n 2 atmosphere and in 15 ml of dry ch 2 cl 2 dry et 3 n was added 0 3 ml 2 156 mmol resting 5 min under stirring at room temperature afterwards a solution of boc 2 o 369 mg 1 694 mmol in 15 ml ch 2 cl 2 was added and rested under stirring at room temperature for 24 h being monitored by tlc then a catalytic amount of 4 dmap and more 100 mg boc 2 o were added keeping the stirring under n 2 atmosphere for 4 more days after complete conversion of the.