preferred_name: penilactone D + H(+) => (S)-5-carboxymethyl-tetronate + o-quinone methide
preferred_name_lc: penilactone d + h(+) => (s)-5-carboxymethyl-tetronate + o-quinone methide
label: penilactone D + H(+) => (S)-5-carboxymethyl-tetronate + o-quinone methide
label_lc: penilactone d + h(+) => (s)-5-carboxymethyl-tetronate + o-quinone methide