Catalog No. Size PriceQuantity
M7975-2 2mg solid $90
M7975-10 10mg solid $270


Totarol is a diterpene originally isolated from P. totara that has diverse biological activities, including antibacterial, antioxidant, and neuroprotective properties.

Product information

CAS Number: 511-15-9

Molecular Weight: 286.45

Formula: C20H30O



Chemical Name: (4bS, 8aS)-4b, 5, 6, 7, 8, 8a, 9, 10-octahydro-4b, 8, 8-trimethyl-1-(1-methylethyl)-2-phenanthrenol

Smiles: CC1(C)CCC[C@@]2(C)[C@H]1CCC1C2=CC=C(O)C=1C(C)C


InChi: InChI=1S/C20H30O/c1-13(2)18-14-7-10-17-19(3,4)11-6-12-20(17,5)15(14)8-9-16(18)21/h8-9,13,17,21H,6-7,10-12H2,1-5H3/t17-,20+/m0/s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

In this study, Totarol was found to inhibit the proliferation of Bacillus subtilis cells with a minimum inhibitory concentration of 2 microM. It did not detectably perturb the membrane structure of B. subtilis; it strongly induced the filamentation in B. subtilis cells, suggesting that it inhibits bacterial cytokinesis. Totarol (1.5 microM) reduced the frequency of the Z-ring occurrence per micrometer of the bacterial cell length but did not affect the nucleoid frequency, suggesting that it blocks cytokinesis by inhibiting the formation of the Z-ring. The assembly dynamics of FtsZ is thought to play an important role in the formation and functioning of the Z-ring, a machine that engineers cytokinesis in bacteria. Since Totarol was shown to inhibit the proliferation of M. tuberculosis, we examined the effects of Totarol on the assembly dynamics of M. tuberculosis FtsZ (MtbFtsZ) in vitro. Totarol decreased the assembly of MtbFtsZ protofilaments and potently suppressed the GTPase activity of MtbFtsZ. It bound to MtbFtsZ with a dissociation constant of 11 +/- 2.3 microM. It increased the fluorescence intensity of the MtbFtsZ-1-anilinonaphthalene-8-sulfonic acid complex and inhibited the fluorescence intensity of N-(1-pyrene)maleimide-labeled MtbFtsZ, suggesting that Totarol induces conformational changes in MtbFtsZ. The results indicated that Totarol can perturb the assembly dynamics of FtsZ protofilaments in the Z-ring. Totarol exhibited extremely weak inhibitory effects on HeLa cell proliferation. It did not affect microtubule organization in HeLa cells[1]


  1. Totarol inhibits bacterial cytokinesis by perturbing the assembly dynamics of FtsZ.Biochemistry. 2007 Apr 10;46(14):4211-20.

Products are for research use only. Not for human use.

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