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: 3122
Function: getPubMedXML

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

P1,P2-diimidazolyl derivatives of pyrophosphate and bis-phosphonates--synthesis, properties, and use in preparation of dinucleoside tetraphosphates and analogs. | LitMetric

P(1),P(2)-Diimidazolyl derivatives of pyrophosphate and halomethylene-bis-phosphonates have been synthesized and characterized, and the mechanism of their formation was studied. These reagents enable synthesis of dinucleoside tetraphosphates and tetraphosphonates conveniently and in high yields.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5705240PMC
http://dx.doi.org/10.1039/c0ob00542hDOI Listing

Publication Analysis

Top Keywords

p1p2-diimidazolyl derivatives
8
derivatives pyrophosphate
8
dinucleoside tetraphosphates
8
pyrophosphate bis-phosphonates--synthesis
4
bis-phosphonates--synthesis properties
4
properties preparation
4
preparation dinucleoside
4
tetraphosphates analogs
4
analogs p1p2-diimidazolyl
4
pyrophosphate halomethylene-bis-phosphonates
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!