肠 (cháng) = intestine +
毒素 (dúsù) = toxin. Many medical and chemical compound names follow this clean N+
毒素 pattern:
神经毒素 (shénjīng dúsù, neurotoxin),
细胞毒素 (xìbāo dúsù, cytotoxin),
内毒素 (nèidúsù, endotoxin). Once you know
毒素, dozens of toxin names unlock.
