Chung Liang Lim

3 Questions 11 Answers 0 Followers

Questions related from Chung Liang Lim

HRMS speculated molecular formula did not match with the NMR spectral data. What is the reason behind?

I have recently isolated an unknown compound with molecular weight of 522 (m/z value = 523). The UV absorption was observed at 263 nm. I have accessed the database to search for any known...

20 January 2015 1,616 10 View

Recently, I used LC/MS to measure the molecular weight (m/z value) of my isolated compounds. Why did my compounds not ionize well in negative mode?

I have isolated several compounds recently and tried to measure their molecular weight or m/z values using LC/MS instrument in order to elucidate their chemical structures. However, I found that...

14 November 2014 2,490 6 View

Can anyone assist me with identifying the novelty of an isolated indolic enamide?

I have searched through Dictionary of Natural Products and found a reported compound. The structure of my compound was found to be identical with the reported one. However, there are some slight...

09 September 2014 2,043 10 View