Hello, 

I would like to purchase 4-tert-Butylcalix[4]arenetetraacetic acid tetraethyl ester (CAS number 97600-39-0). Could you please provide pricing information for the available quantities, as well as details regarding lead time and shipping options?
Additionally, I would like to know if it would be possible to obtain a small sample (a few grams) for evaluation purposes.
Thank you in advance for your assistance. 
I look forward to your response.

Miriam