| 摘要 |
PROBLEM TO BE SOLVED: To obtain a delivery system for cyclopentene. SOLUTION: This composition comprises (a) a compound of the formula [1-chloro-4-cyclopropen-1-ylmethyl-benzene as an example; (1) R<1> , R<2> , R<3> and R<4> are each independently a group of the formula -(L)n -Z; (2) the total number of atoms except hydrogen in each compound is <=50], its enantiomer, stereoisomer, salt and mixture and (b) a packaging material.
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