Media type: E-Article Title: Polyterpene und Polyterpenoide CXII. Über die Struktur der Ringe C–E der pentacyclischen Triterpene Contributor: Ruzicka, L.; Goldberg, M. W.; Hofmann, K. imprint: Wiley, 1937 Published in: Helvetica Chimica Acta Language: English DOI: 10.1002/hlca.19370200147 ISSN: 1522-2675; 0018-019X Keywords: Inorganic Chemistry ; Organic Chemistry ; Physical and Theoretical Chemistry ; Drug Discovery ; Biochemistry ; Catalysis Origination: Footnote: