maysin

Noun

 * 1)  An insecticidal flavone glycoside 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-6-[4-hydroxy-6-methyl-5-oxo-3-(3,4,5-trihydroxy-6-methyloxan-2-yl)oxyoxan-2-yl]chromen-4-one