2 L-tyrosinal = 4-{[(2S,5S)-5-[(4-hydroxyphenyl)methyl]-2,5-dihydropyrazin-2-yl]methyl}phenol + 2 H2O + H(+)
2 l-tyrosinal = 4-{[(2s,5s)-5-[(4-hydroxyphenyl)methyl]-2,5-dihydropyrazin-2-yl]methyl}phenol + 2 h2o + h(+)