preferred_name: peniphenone D + o-quinone methide + H(+) <=> penilactone A
preferred_name_lc: peniphenone d + o-quinone methide + h(+) <=> penilactone a
label: peniphenone D + o-quinone methide + H(+) <=> penilactone A
label_lc: peniphenone d + o-quinone methide + h(+) <=> penilactone a