preferred_name: ethene + methanethiol + A + H2O => 2-(methylsulfanyl)ethanol + AH2
preferred_name_lc: ethene + methanethiol + a + h2o => 2-(methylsulfanyl)ethanol + ah2
label: ethene + methanethiol + A + H2O => 2-(methylsulfanyl)ethanol + AH2
label_lc: ethene + methanethiol + a + h2o => 2-(methylsulfanyl)ethanol + ah2