In order to explore new scaffolds for large-conductance Ca2+-activated K+ channel (BK channel) openers, we carried out molecular design and synthesis on the basis of the following two concepts:(1) introduction of a heteroatom into the dehydroabietic acid (BK channel opener) skeleton would allow easier introduction of substituents.(2) Because of the fourfold symmetrical structure of BK channels, dimeric compounds in which two ...