[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an alkynylborate salt and a terminal acetylenic compound. It contains a tetraethynylborate."}, {"from": "gpt", "value": "[B-1][Branch1][Ring1][C][#C][Branch1][Ring1][C][#C][Branch1][Ring1][C][#C][C][#C].[K+1]"}]