The present invention is directed to compounds of the formula ##STR1## wherein R.sub.1 is lower alkyl and R.sub.2 is lower alkyl or aryl. Also provided are methods for preparation of these compounds. The compounds of formula I above are useful as plant growth regulants.
本发明涉及化合物的公式 ##STR1## 其中R.sub.1是低碳基,R.sub.2是低碳基或芳基。本发明还提供了制备这些化合物的方法。上述公式I的化合物可用作
植物生长调节剂。