A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 176

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 1034
Function: getPubMedXML

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3152
Function: GetPubMedArticleOutput_2016

File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

8-Hy-droxy-6-meth-oxy-7-(3-methyl-but-2-en-yloxy)coumarin (capensine). | LitMetric

8-Hy-droxy-6-meth-oxy-7-(3-methyl-but-2-en-yloxy)coumarin (capensine).

IUCrdata

Key Laboratory of Plants Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Science, Urumqi 830011, People's Republic of China.

Published: May 2021

The title coumarin derivative, CHO, was isolated from the roots of . The coumarin (2-chromen-2-one) fragment is almost planar, with an r.m.s. deviation of 0.0356 Å. The carbon atom of the meth-oxy substituent is coplanar with the benzo-pyran oxa-heterocycle. The 3-methyl-but-2-en-yloxy group is disordered over two sets of sites with occupation factors of 0.920 (3) and 0.080 (3). In the crystal, mol-ecules are linked by O-H⋯O and C-H⋯O hydrogen bonds into chains propagating along the [101] direction.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9462336PMC
http://dx.doi.org/10.1107/S241431462100451XDOI Listing

Publication Analysis

Top Keywords

8-hy-droxy-6-meth-oxy-7-3-methyl-but-2-en-yloxycoumarin capensine
4
capensine title
4
title coumarin
4
coumarin derivative
4
derivative cho
4
cho isolated
4
isolated roots
4
roots coumarin
4
coumarin 2-chromen-2-one
4
2-chromen-2-one fragment
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!