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A major impurity in 3H-17α-hydroxypregnenolone

✍ Scribed by Martin I. Shapiro; Bhagu R. Bhavnani

Publisher
John Wiley and Sons
Year
1975
Tongue
French
Weight
185 KB
Volume
11
Category
Article
ISSN
0022-2135

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✦ Synopsis

Abstract

Evidence of a major impurity in commercially available ^3^H‐17α‐hydroxypregnenolone is presented.

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NMR spectral assignment of 2α- and 3β-me
NMR spectral assignment of 2α- and 3β-methylhopanes and evidence for boat conformation in D ring of 17α(H),21α(H)-hopanes
✍ Geir Kildahl-Andersen; Hans Peter Nytoft; Jon Eigill Johansen 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 92 KB

## Abstract The full ^1^H and ^13^C NMR chemical shift assignment of 2α‐methyl‐17α(__H__),21β(__H__)‐hopane is presented. This compound is formed in mature sediments from biogenic sources of 2β‐methyl‐17β(__H__),21β(__H__)‐hopanoids, which include several cyanobacteria. In addition, full ^1^H and ^