40 



The Philippine Journal of Science 



and by Power and Lees in the references cited. For purposes 

 of identification, the melting point and specific rotation of the 

 compound isolated by me were determined, and comparison was 

 made with those of the products isolated by these works. 

 Table I. — Melting point and specific rotation of gynocardin. 



SeedS „°JJ%™* ardia Leaves of Pangium edule. b I Seeds °JS™° ium 



Melting point. _°C-- 

 Specific rotation in 

 chloroform solu- 

 tion. 



[ a ] 2 |j- (16. 885%) = +62. 2° 



* Powers and Lees, loc. cit. b De Jong, loc. cit. c Occurring in the Philippine Islands. 



The properties of the compound isolated from the seeds of 

 Pangium edule are so nearly identical with those of the glucoside 

 from the seeds of Gynocardia odorata and from the leaves of 

 Pangium edule that no doubt exists as to their identity. De 

 Jong found that the concentration of the chloroform solution 

 had considerable influence on the specific rotation of the com- 

 pound. This fact is apparent in the results quoted above from 

 his publication. 



Gynocardin differs from the other members of this class of 

 compounds in its marked stability in the presence of acid hy- 

 drolyzing agents. It also hydrolyzed very slowly by emulsin. 



Table II.— 



■Hydrolysis of gynocardin by 



means 



of emulsin. 





' Quantity 





! 









1 of gyno- 

 1 cardin. 

 t- „ , Solution 

 T,me. of2 



j grams in 

 1 300 cc. 



Quantity 



Quantity 



of other 



sub- 



Glucoside 

 hydro- 







emulsin. 



stance 

 added. 



lyzed. 







1 water. 





i 









Min. ! cc. 



j 



Per cent. 







Grams. 







20 1 25 





none | 



0.68 







40 1 25 





none 



0.72 







60 



25 





none 



0.76 







20 



25 



0.10 



none 



0.96 







40 



25 



0.10 



none | 



1.02 







60 



25 



0.10 



none 1 



1.08 







20 



25 



0.05 



• 0.20 



0.52 







40 



25 



"0.40 



0.40 





















60 



25 





•0.30 



0.48 







20 



25 





t>l 



2.05 







40 



25 



0.05 



b5 j 



1.94 







60 



25 



0.05 

 0.05 



no | 



0.52 





• Glucose 



in grams. 







b Hydroc 



fame ac 



id in cubi 



c centime 



ters of 0.1 



per cent 



solution. 



