Tex. Health & Safety Code § 481.1022
Penalty Group 1-B consists of the following opiates, including their isomers, esters, ethers, salts, and salts of isomers, esters, and ethers, if the existence of these isomers, esters, ethers, and salts is possible within the specific chemical designation:
Acetyl-alpha-methylfentanyl (N-[1-(1-methyl-2- phenethyl)-4-piperidinyl]-N-phenylacetamide);
Alfentanil;
Alpha-methylthiofentanyl (N-[1-methyl-2-(2- thienyl)ethyl-4-piperidinyl]-N-phenylpropanamide);
Beta-hydroxyfentanyl (N-[1-(2-hydroxy-2- phenethyl)-4-piperidinyl] -N-phenylpropanamide);
Beta-hydroxy-3-methylfentanyl;
Carfentanil;
Fentanyl , alpha-methylfentanyl, and any other derivative of fentanyl;
3-methylfentanyl(N-[3-methyl-1-(2-phenylethyl)- 4-piperidyl]-N-phenylpropanamide);
3-methylthiofentanyl(N-[3-methyl-1-(2-thienyl) ethyl-4-piperidinyl]-N-phenylpropanamide);
Para-fluorofentanyl(N-(4-fluorophenyl)-N-1-(2- phenylethyl)-4-piperidinylpropanamide);
Remifentanil;
Sufentanil; and
Thiofentanyl(N-phenyl-N-[1-(2-thienyl)ethyl-4- piperidinyl]-propanamide).
Tex. Health and Safety Code § 481.1022