Synonyms: (r-(e))-3,5-dimethyl-4-hydroxy-5-(2-methyl-1,3-butadienyl)-2(5h)-thiophenone;3,5-dimethyl-4-hydroxy-5-(2-methyl-1,3-butadienyl)-2(5h)-thiophenon(r-(e));Antibiotic 2-200, [R-(E)]-4-Hydroxy-3,5-dimethyl-5-(2-methyl-1,3-butadienyl)-2(5H)-thiophenone, (5R)-4-Hydroxy-3,5-dimethyl-5-[(1E)-2-methyl-1,3-butadienyl]-2(5H)-thiophenone;(S)-4-Hydroxy-3,5-dimethyl-5-[(2E)-2-methyl-1,3-butadienyl]thiophen-2(5H)-one;(S)-4-Hydroxy-3,5-dimethyl-5-[(E)-2-methyl-1,3-butadienyl]thiophen-2(5H)-one