preferred_name: an N-acylsphinganine + H2O <=> sphinganine + a fatty acid
preferred_name_lc: an n-acylsphinganine + h2o <=> sphinganine + a fatty acid
label: an N-acylsphinganine + H2O <=> sphinganine + a fatty acid
label_lc: an n-acylsphinganine + h2o <=> sphinganine + a fatty acid