YMDB 2.0: a significantly expanded version of the yeast metabolome database. - Miguel Ramirez-Gaona; Ana Marcu; Allison Pon; An Chi Guo; Tanvir Sajed; Noah A. Wishart; Naama Karu; Yannick Djoumbou Feunang; David Arndt; David S. Wishart (Nucleic Acids Res., 2017)