Luteolin 7-sulfate, derived from the marine plant Phyllospadix iwatensis Makino, suppresses TYR gene expression by intervening in a signaling pathway involving the cAMP-responsive element binding protein (CREB) and microphthalmia-associated transcription factor (MITF). This inhibition ultimately leads to a decrease in melanin synthesis.
4,5,6,7-Tetrachlorophthalide is a fungicide used for the control of rice blast. It has a role as a melanin synthesis inhibitor and an antifungal agrochemical.