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A comparative study of the mass spectra of Δ4(5)-, Δ5(6)-, and Δ5(10)-3-ethyleneketals of 19-norsteroids

✍ Scribed by P. Toft; N.N. Saha; A.J. Liston

Book ID
119481082
Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
267 KB
Volume
14
Category
Article
ISSN
0039-128X

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## Abstract The mass spectra (20 eV electron energy) of a wide range of %Δ^5^‐3β‐hydroxy C~19~ steroid TMS ethers have been examined with the aid of high‐resolution mass measurements, together with deuterium and oxygen‐18 labelling data. The validity of many previously proposed fragmentation modes