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A nitrogen mustard given orally and intravenously in the treatment of multiple myeloma and other neoplasms; 4-bis(2-chloroethyl)amino- l -phenylalanine, C ₁₃ H ₁₈ Cl ₂ N ₂ O ₂.
1960s. From me- + L + ph- and -alan-.
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