preferred_name: acetylcholine(out) + 2 H(+)(in) <=> acetylcholine(in) + 2 H(+)(out)
preferred_name_lc: acetylcholine(out) + 2 h(+)(in) <=> acetylcholine(in) + 2 h(+)(out)
label: acetylcholine(out) + 2 H(+)(in) <=> acetylcholine(in) + 2 H(+)(out)
label_lc: acetylcholine(out) + 2 h(+)(in) <=> acetylcholine(in) + 2 h(+)(out)