Product development of piper retrofractum vahl candy in supporting the local potential of maduraKhoirul Hidayat, R. Arief Firmansyah, M. Fuad Fauzul Mu’tamar and Annafatur RohmaniyahBIO Web Conf., 146 (2024) 01074DOI: https://doi.org/10.1051/bioconf/202414601074