K-13 (ACE inhib)

K-13(enzyme inhibitor)

(9S,12S,15S)-15-(Acetylamino)-4-hydroxy-12-[(4-hydroxyphenyl)methyl]-11,14-dioxo-2-oxa-10,13-diazatricyclo[15.2.2.13,7]docosa-3,5,7(22),17,19(1),20-hexene-9-carboxylic acid