( )-SC 51146 ( -)-SC 53228 153633-01-3 2H-1-Benzopyran-2-propanoic acid, 7-(3-(2-(cyclopropylmethyl)-3-methoxy-4-((methylamino)carbonyl)phenoxy)propoxy)-3,4-dihydro-8-propyl-, (2S)- 2H-1-Benzopyran-2-propanoic acid, 7-(3-(2-(cyclopropylmethyl)-3-methoxy-4-((methylamino)carbonyl)phenoxy)propoxy)-3,4-dihydro-8-propyl-, (S)- SC-53228