On 14th February, Bird & Bird produced a useful summary of the current position on EU sanctions. The introduction says that when conducting international business in a globalised economy, it is essential to comply with all applicable national and international law. In order to facilitate compliance with EU sanctions regimes, this summary provides a current state of play of certain sanctions that are imposed by the EU.
https://www.twobirds.com/en/news/articles/2018/global/eu-sanctions-and-the-current-state-of-play