zapoterin

Noun

 * 1)  A natural product, the tetranortriterpenoid (1R,2R,4S,7S,8S,10S,11R,12R,18R)-7-(furan-3-yl)-10-hydroxy-1,8,12,17,17-pentamethyl-3,6,16-trioxapentacyclo[9.9.0.02,4.02,8.012,18]icos-13-ene-5,15,20-trione