卟啉

bǔ lín

porphyrin (organic chemical essential to hemoglobin and chlorophyll) (loanword)

卟

bǔ

used in the transliteration of the names of organic compounds porphyrin 卟啉[bu3 lin2] and porphin 卟吩[bu3 fen1]

啉

lín

used in the transliteration of the names of organic compounds such as porphyrin 卟啉[bu3 lin2] and quinoline 喹啉[kui2 lin2]