smaller mustard have genetic isotopes of smaller weight
hn2_mustard is not nitrogen_mustard. hn1_mustard is nitrogen_mustard. hn1_mustard is not nitrogen_mustard. yellow_mustard is mustard. white_mustard is not mustard. white_mustard is mustard. nitrogen_mustard is compound. hn2_mustard is nitrogen_mustard. honey_mustard is mustard. honey_mustard is not mustard.