ailanthone

Noun

 * 1)  The allelopathic compound (1S,4R,5R,7S,11R,13S,17S,18S,19R)-4,5,17-trihydroxy-14,18-dimethyl-6-methylidene-3,10-dioxapentacyclo[9.8.0.01,7.04,19.013,18]nonadec-14-ene-9,16-dione present in