Liu, Hao-Long et al. published their research in Food Chemistry in 2015 | CAS: 18836-52-7

(2E,4E)-N-Isobutyldeca-2,4-dienamide (cas: 18836-52-7) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. Amides can be recrystallised from large quantities of water, ethanol, ethanol/ether, aqueous ethanol, chloroform/toluene, chloroform or acetic acid. The likely impurities are the parent acids or the alkyl esters from which they have been made. The former can be removed by thorough washing with aqueous ammonia followed by recrystallisation, whereas elimination of the latter is by trituration or recrystallisation from an organic solvent.Reference of 18836-52-7

Identification and simultaneous quantification of five alkaloids in Piper longum L. by HPLC-ESI-MSn and UFLC-ESI-MS/MS and their application to Piper nigrum L. was written by Liu, Hao-Long;Luo, Rong;Chen, Xiao-Qing;Ba, Yin-Ying;Zheng, Li;Guo, Wei-Wei;Wu, Xia. And the article was included in Food Chemistry in 2015.Reference of 18836-52-7 The following contents are mentioned in the article:

A simple, effective and suitable UFLC-ESI-MS/MS method was developed for simultaneous determination of 5 characteristic alkaloids (piperine, piperlonguminine, Δα,β-dihydropiperlonguminine, pellitorine, piperanine) in Piper longum and Piper nigrum. The MS detection was carried out in multiple reaction monitoring scan mode. The method had good specificity, linearity (R2 >0.995), stability (RSD <2.53%), repeatability (RSD <2.58%), and recovery (90.0-103.5%). The limits of detection and quantification of the 5 alkaloids ranged 0.02-0.03 and 0.05-0.10 ng/mL, resp. The intra-day and inter-day precision was less than 9.30 and 9.55%, resp. The validation results confirmed that the method could simultaneously determine the target alkaloids in the samples. The alkaloid identities were verified by HPLC-ESI-MS/MS. Compared with P. nigrum, P. longum had lower piperine content but was richer in the other four alkaloids. This study involved multiple reactions and reactants, such as (2E,4E)-N-Isobutyldeca-2,4-dienamide (cas: 18836-52-7Reference of 18836-52-7).

(2E,4E)-N-Isobutyldeca-2,4-dienamide (cas: 18836-52-7) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. Amides can be recrystallised from large quantities of water, ethanol, ethanol/ether, aqueous ethanol, chloroform/toluene, chloroform or acetic acid. The likely impurities are the parent acids or the alkyl esters from which they have been made. The former can be removed by thorough washing with aqueous ammonia followed by recrystallisation, whereas elimination of the latter is by trituration or recrystallisation from an organic solvent.Reference of 18836-52-7

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics