preferred_name: G[3'-5']pA[3'-5']pAp[3'] + H(+) => 3',3',3'-cAAG + H2O
preferred_name_lc: g[3'-5']pa[3'-5']pap[3'] + h(+) => 3',3',3'-caag + h2o
label: G[3'-5']pA[3'-5']pAp[3'] + H(+) => 3',3',3'-cAAG + H2O
label_lc: g[3'-5']pa[3'-5']pap[3'] + h(+) => 3',3',3'-caag + h2o