1,5-(Epoxymethano)cyclopenta[c]pyran-3-carboxamide, 1,4a,5,7a-tetrahydro-5-hydroxy-8-oxo-, (1.alpha.,4a.beta.,5.beta.,7a.beta.)-(-)- 1,5-(epoxymethano)cyclopenta[c]pyran-3-carboxamide, 1,4a,5,7a-tetrahydro-5-hydroxy-8-oxo-, (1.alpha.,4a.beta.,5.beta.,7a.beta.)-, (-)- 79127-35-8 ECHINOSPORIN NSC357683 XK 213