Chemistry, part 1

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > amino-acid derivative > proteinogenic amino acid derivative > l-methionine derivative

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > chalcogen molecular entity > sulfur molecular entity > organosulfur compound > methionine derivative > l-methionine derivative

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > organonitrogen compound > amino-acid derivative > methionine derivative > l-methionine derivative