胸腺嘧啶

xiōng xiàn mì dìng

thymine nucleotide (T, pairs with adenine A 腺嘌呤 in DNA)

胸

xiōng

variant of 胸[xiong1]

腺

xiàn

gland

嘧

mì

(phonetic) as in pyrimidine

啶

dìng

idine (chemistry)