159634-47-6 Ibutamoren L 163191 Propanamide, 2-amino-N-((1R)-2-(1,2-dihydro-1-(methylsulfonyl)spiro(3H-indole-3,4'-piperidin)-1'-yl)-2-oxo-1-((phenylmethoxy)methyl)ethyl)-2-methyl- Propanamide, 2-amino-N-(2-(1,2-dihydro-1-(methylsulfonyl)spiro(3H-indole-3,4'-piperidin)-1'-yl)-2-oxo-1-((phenylmethoxy)methyl)ethyl)-2-methyl-, (R)-