Betulinaldehyde(Betunal) belongs to pentacyclic triterpenoids and was reported to exhibit antimicrobial activities against bacteria and fungi, including S. aureus.IC50 value:Target: Betulinaldehyde(Betunal) belongs to pentacyclic triterpenoids that are based on a 30-carbon skeleton comprising four six-membered rings and one five-membered ring. Betulinaldehyde regulates multiple desirable targets which could be further explored in the development of therapeutic agents for the treatment of S. aureus infections [1]. Study compounds α-amyrin [3β-hydroxy-urs-12-en-3-ol (AM)], betulinic acid [3β-hydroxy-20(29)-lupaene-28-oic acid (BA)] and betulinaldehyde [3β-hydroxy-20(29)-lupen-28-al (BE)] belong to pentacyclic triterpenoids and were reported to exhibit antimicrobial activities against bacteria and fungi, including S. aureus. The MIC values of these compounds against a reference strain of methicillin-resistant S. aureus (MRSA) (ATCC 43300) ranged from 64 μg/ml to 512 μg/ml. However, the response mechanisms of S. aureus to these compounds are still poorly understood [2].

References:
[1]. Chung PY, et al. Identification, by gene expression profiling analysis, of novel gene targets in Staphylococcus aureus treated with betulinaldehyde. Res Microbiol. 2013 May;164(4):319-26.
[2]. Chung PY, et al. Transcriptional profiles of the response of methicillin-resistant Staphylococcus aureus to pentacyclic triterpenoids. PLoS One. 2013;8(2):e56687.