Cephalosporin P1

Cephalosporin P1

Names
IUPAC name (2Z)-2-[(3R,4S,5S,6R,7R,8S,9S,10R,13R,14S,16S)-6,16-diacetyloxy-3,7-dihydroxy-4,8,10,14-tetramethyl-2,3,4,5,6,7,9,11,12,13,15,16-dodecahydro-1H-cyclopenta[a]phenanthren-17-ylidene]-6-methylhept-5-enoic acid
Other names Acremonic acid
Identifiers
CAS Number	13258-72-5  Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL3401949
PubChem CID	3037114
UNII	2U8E6JLQ1J  Y
InChI InChI=1S/C33H50O8/c1-17(2)10-9-11-21(30(38)39)26-22-12-13-25-31(6)15-14-23(36)18(3)27(31)28(41-20(5)35)29(37)33(25,8)32(22,7)16-24(26)40-19(4)34/h10,18,22-25,27-29,36-37H,9,11-16H2,1-8H3,(H,38,39)/b26-21-/t18-,22+,23-,24+,25+,27-,28-,29+,31-,32+,33-/m1/s1 N Key: YJJWILCYIMMPAS-VALXSNPUSA-N Y
SMILES C[C@@H]1[C@@H](CC[C@]2([C@H]1[C@H]([C@@H]([C@]3([C@H]2CC[C@@H]\4[C@@]3(C[C@@H](/C4=C(/CCC=C(C)C)\C(=O)O)OC(=O)C)C)C)O)OC(=O)C)C)O
Properties
Chemical formula	C33H50O8
Molar mass	574.755 g·mol−1
Density	g/cm³
Solubility in water	poorly soluble [1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N (what is  YN ?) Infobox references

Cephalosporin P1 is a naturally occurring antibiotic compound belonging to the cephalosporin class, which was first isolated from the fungus Cephalosporium acremonium (later reclassified as Acremonium chrysogenum ) ^[2] . It is one of the early cephalosporins discovered, alongside cephalosporin C and other related metabolites.

Fusidane-type antibiotics are a class of triterpenoid antibiotics that include helvolic acid, fusidic acid, and cephalosporin P₁. ^[3] Among these, fusidic acid is notable for its clinical use in treating bacterial infections. ^[4]

Uses

Unlike later-generation cephalosporins used clinically, cephalosporin P₁ has limited therapeutic use due to its weaker antibacterial activity.

Cephalosporin P₁ demonstrated strong effectiveness against methicillin-sensitive Staphylococcus aureus , methicillin-resistant S. aureus, and vancomycin-intermediate S. aureus strains. ^[5]

References

1. Bycroft, Barrie W.; Payne, David J. (9 August 2013). Dictionary of Antibiotics and Related Substances: Second Edition. CRC Press. p. 463. ISBN   978-1-4822-8215-3 . Retrieved 24 July 2025.
2. Chou, T. S.; Eisenbraun, E. J.; Rapala, R. T. (1 January 1967). "The chemistry of cephalosporin P1". Tetrahedron Letters . 8 (5): 409–414. doi:10.1016/S0040-4039(00)90960-2. ISSN   0040-4039 . Retrieved 24 July 2025.
3. Advances in Applied Microbiology. Academic Press. 18 January 1980. p. 99. ISBN   978-0-08-056439-5 . Retrieved 24 July 2025.
4. Cao, Zhi-Qin; Lv, Jian-Ming; Liu, Qiu; Qin, Sheng-Ying; Chen, Guo-Dong; Dai, Ping; Zhong, Yue; Gao, Hao; Yao, Xin-Sheng; Hu, Dan (17 January 2020). "Biosynthetic Study of Cephalosporin P1 Reveals a Multifunctional P450 Enzyme and a Site-Selective Acetyltransferase". ACS Chemical Biology . 15 (1): 44–51. doi:10.1021/acschembio.9b00863. ISSN   1554-8929 . Retrieved 24 July 2025.
5. O'Neill, A. J.; Bostock, J. M.; Moita, A. Morais; Chopra, I. (December 2002). "Antimicrobial activity and mechanisms of resistance to cephalosporin P1, an antibiotic related to fusidic acid". The Journal of Antimicrobial Chemotherapy . 50 (6): 839–848. doi:10.1093/jac/dkf248. ISSN   0305-7453 . Retrieved 24 July 2025.