label: 2-GDP-(2S,3S,6R)-3-hydroxy-5-amino-6-methyl-3,6-dihydro-2H-pyran + H(+) => 2-GDP-(2S,3S,6R)-3-hydroxy-5-imino-6-methyloxane
label_lc: 2-gdp-(2s,3s,6r)-3-hydroxy-5-amino-6-methyl-3,6-dihydro-2h-pyran + h(+) => 2-gdp-(2s,3s,6r)-3-hydroxy-5-imino-6-methyloxane