4-Hydroxy-3,5-Dimethyl-5-(2-Methyl-Buta-1,3-Dienyl)-5h-Thiophen-2-OneAntibiotic 2-200(5R)-4-Hydroxy-3,5-dimethyl-5-[(1E)-2-methyl-1,3-butadienyl]-2(5H)-thiophenoneThiolactomycin[R-(E)]-4-Hydroxy-3,5-dimethyl-5-(2-methyl-1,3-butadienyl)-2(5H)-thiophenone