PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 1742164-6 1991 (3) Cyclic hexapeptide somatostatin analogs containing 2-Ac5c [trans-(1S,2S)-2-Ac5c, trans-(1R,2R)-2-Ac5c,cis-(1R,2S)-2-Ac5c, and cis-(1S,2R)-2-Ac5c] in place of proline c[(2-Ac5c)6-Phe7-D-Trp8-Lys9-Thr10-Phe11]. trans-(1s,2s)-2-ac5c 63-83 somatostatin Homo sapiens 23-35