2-[(4R,10S,16S,19R,28R,31S)-31-benzyl-10-[(2S)-butan-2-yl]-19-butyl-13,22-bis(3-carbamimidamidopropyl)-4-[[(2S)-1-[(2S,5R)-2-(3-carbamimidamidopropyl)-5-carbamoyl-3-oxopiperazin-1-yl]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]carbamoyl]-37-(heptanoylamino)-7-(hydroxymethyl)-34-(1H-imidazol-4-ylmethyl)-28-methyl-6,9,12,15,18,21,24,27,30,33,36-undecaoxo-1,2-dithia-5,8,11,14,17,20,23,26,29,32,35-undecazacyclooctatriacont-16-yl]acetic acid
PL-3994 is under investigation in clinical trial NCT01304628 (Cross-Over Study of Subcutaneous Study Drug for the Treatment of Patients With Mild to Moderate Asthma).