Imports In 2018, Oman imported $40.7k in Buta-1, 3-diene and isoprene, becoming the 0th largest importer of Buta-1, 3-diene and isoprene in the world. At the same year, Buta-1, 3-diene and isoprene was the 0th most imported product in Oman. Oman imports Buta-1, 3-diene and isoprene primarily from: N/A.