Media type: E-Article Title: New spiro derivatives of penicillin Contributor: Chan, Lam; Matlin, Stephen A. Published: Elsevier BV, 1981 Published in: Tetrahedron Letters, 22 (1981) 40, Seite 4025-4028 Language: English DOI: 10.1016/s0040-4039(01)82055-4 ISSN: 0040-4039 Origination: Footnote: