When the humidity in the air content of more than 100%, the sealing ring bacteria get enough water, and the oxygen in the air friction and luminescence, dry after the disappearance.
The invention relates to a method for producing tetrahydropyrane derivatives which comprise at least one additional ring containing oxygen.
本发明涉及一种制备包含至少一个另外的含氧环的四氢吡喃衍生物的方法。
3
This paper reviews the catalyst system in RCM reaction and RCM application in the synthesis of natural products including carbon ring, oxygen heterocycles and nitrogen heterocycles, etc.