哌嗪-N,N′-双(2-乙磺酸) 钠盐PIPES 钠盐PIPES sodium salt1,4-哌嗪二乙磺酸 钠盐1,4-piperazinediethanesulfonic acid sodium saltPiperazine-1,4-diethanesulfonate, sodium salt1,4-Piperazinediethanesulfonic acid, sodium salt (1:1)monosodium PIPESPIPES monosodiumsodium PIPES1,4-Piperazinediethanesulfonic acid, monosodium saltPIPES monosodium saltpiperazine-N,N'-bis(2-ethanesulfonic acid) sodium saltSodium hydrogen piperazine-1,4-diethanesulphonate