label: 4-hydoxytryptamine 4-phosphate + 2 S-adenosyl-L-methionine = psilocybin + 2 S-adenosyl-L-homocysteine + 2 H(+)
label_lc: 4-hydoxytryptamine 4-phosphate + 2 s-adenosyl-l-methionine = psilocybin + 2 s-adenosyl-l-homocysteine + 2 h(+)