PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 27782413-1 2016 The addition reactions of chlorine atom with isobutene (i-C4H8) in solid para-hydrogen (p-H2) were investigated with infrared (IR) absorption spectra. i-c4h8 56-62 polyhomeotic homolog 2 Homo sapiens 88-92