Identification of Functional Groups and Types of Anthocyanin Pigments of Purple Sweet Potato cv. Antin 2 and cv. Antin 3Siti Farida, Elfi Anis Saati, Damat Damat, Ahmad Wahyudi and Nguyen Van MinhBIO Web Conf., 104 (2024) 00040DOI: https://doi.org/10.1051/bioconf/202410400040