| 摘要 |
Analogues and derivatives of dieldrin and dihydroaldrin containing a reduced number of chlorine atoms, and hence improved biodegradability, have the formula <IMAGE> wherein R1, R2, and R3 and H or Cl at least one of them being H, and the oxygen bridge is 5:8, 6:7, or 7:8, or both 5:8 and 6:7.
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