PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 29915187-3 2018 Efficient isolation of 12C precursors and quantification at the MS2 level allowed accurate determination of quantitative differences between up to six multiplexed samples. 5-(2-formyl-3-hydroxyphenoxy)pentanoic acid 23-26 MS2 Homo sapiens 64-67