| 摘要 |
<p>A defoliating composition comprising a compound have the structural formula <IMAGE> wherein R is F, Cl, 3-Br, 4-Br, I, CN or CX3, where X is F, Cl or Br; R1 is hydrogen or C1-C4 alkyl; and R2 is C1-C4 alkyl and a carrier for said compound is disclosed.</p> |
