SC209（Cat No.:I044029）is a potent and selective antagonist of the serotonin 5-HT2B receptor, part of the G protein-coupled receptor family involved in neurotransmission, cardiovascular regulation, and fibrotic processes. By inhibiting 5-HT2B signaling, SC209 modulates serotonin-mediated effects, making it a valuable tool in research on cardiac valvulopathy, pulmonary hypertension, and neuropsychiatric disorders. Its specificity allows for targeted studies without affecting other serotonin receptor subtypes, reducing off-target effects. SC209 is particularly useful in dissecting the role of 5-HT2B in serotonin-related pathologies and evaluating therapeutic strategies aimed at serotonin receptor modulation.