(R-(E))-3,5-Diethyl-4-hydroxy-5-(2-methyl-1,3-butadienyl)-2(5H)-thiophenone 2(5H)-Thiophenone, 3,5-diethyl-4-hydroxy-5-(2-methyl-1,3-butadienyl)-, (R-(E))- 85263-97-4 Antibiotic OM 674 Thiotetromycin