ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,710, issued on Dec. 30, was assigned to ZHEJIANG CHINESE MEDICAL UNIVERSIYT (Hangzhou, China).

"Endophytic bacterial strain for preparing camptothecin and preparation method of camptothecin" was invented by Guoyin Kai (Hangzhou, China), Yue Feng (Hangzhou, China) and Chao Huang (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides an endophytic bacterial strain with a high camptothecin yield, which is Alternaria temuissima ZCMUKL-S1, deposited as CCTCC NO: M2021189, or Alternaria citricancri ZCMUKL-S2, deposited as CCTCC NO: M2021190, or Aspergillus versicolor ZCMUKL-S3, deposited as CCTCC NO: M2021191. The...