(3)米(R)-2— bromooctane CH H (4)5 chloro-3 propyl, 3 heptadien- 6 yne CH=CHC= CHCHCIC≡CH(3)*(R)―2 ― bromooctane (4)5 ― chloro―3 ― propyl ― 1,3 ― heptadien ― 6 ― yne Br CH3 C8H17 H CH=CHC=CHCHClC CH C3H7