iridolactone

例句：

1. 1. The pigment in the flower is a unique form of iridolactone.
   这种花中的颜色素是一种独特的虹彩酮。
2. 2. The scientist discovered a new compound containing this iridolactone.
   这位科学家发现了一种含有这种虹彩酮的新化合物。
3. 3. Iridolide is a rare chemical found in certain types of seaweed.
   碘螺青是一种罕见的化学物质，存在于某些类型的海藻中。