Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My Custom Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1979 6
1980 6
1981 9
1982 5
1983 8
1984 14
1985 19
1986 30
1987 29
1988 28
1989 38
1990 50
1991 51
1992 74
1993 82
1994 91
1995 106
1996 124
1997 129
1998 161
1999 185
2000 177
2001 206
2002 257
2003 359
2004 489
2005 588
2006 702
2007 851
2008 991
2009 1233
2010 1432
2011 1705
2012 1952
2013 2245
2014 2684
2015 3027
2016 3224
2017 3574
2018 4298
2019 4952
2020 5935
2021 6708
2022 7877
2023 7504
2024 7058
2025 17

Publication date

Text availability

Article attribute

Article type

Additional filters

Article Language

Species

Sex

Age

Other

Search Results

63,959 results

Results by year

Filters applied: . Clear all
Page 1
1,1'-Bis(1-acetyl-5-methyl-1H-pyrazol-3-yl)ferrocene.
Zhu BB, Shi YC, Shen WB, Li QK. Zhu BB, et al. Among authors: li qk. Acta Crystallogr Sect E Struct Rep Online. 2011 Nov;67(Pt 11):m1533. doi: 10.1107/S1600536811041924. Epub 2011 Oct 12. Acta Crystallogr Sect E Struct Rep Online. 2011. PMID: 22219778 Free PMC article.
63,959 results
You have reached the last available page of results. Please see the User Guide for more information.