QECC [[19,9,4]]

This pure code is based on a linear self-orthogonal code over GF(4) with generator matrix:

[  1   0   0   0   0   a a^2   0   0   1 a^2   a a^2 a^2   1 a^2 a^2   0 a^2]
[  0   1   0   0   0 a^2   0 a^2   a a^2   a   1   1   a   1   1   1   a a^2]
[  0   0   1   0   0   a   1   1   a   0   1 a^2 a^2   a   1   a   1   a a^2]
[  0   0   0   1   0   1 a^2   a   a   1   a   0   0 a^2 a^2   1   1   0   1]
[  0   0   0   0   1 a^2 a^2   a   1   1   a   0 a^2   a   1   1   a   a   a]

QECC [[19,9,4]]

Matrix with stabilizers/seed generators and circuit for encoding: